What should I sell online

Every "profitable niches" list you've opened has roughly the same eleven items on it, and not one of them tells you what to do on Monday morning.

Sell the thing you can get hold of reliably, get to a buyer without it breaking, and that somebody has already asked you for. In that order. For a one-person shop the binding constraint is almost never how big the market is; it's what you can source at a price that works and ship without losing money. A product with a ₦900 margin that you can only make nine of a week is a better business than one with a ₦400 margin and a 200-unit minimum order, and the second one looks far more like a business from the outside.

This is a way of deciding rather than a list of ideas, because a list of ideas is what got you here.

"Pick a profitable niche" is mostly worthless advice

Three reasons, and they compound.

Profitability isn't a property of a category. It's a property of your cost of goods, your delivery cost, your price, and your ability to get more units. Two people selling the same candles at the same price have completely different margins because one buys wax by the sack from a supplier three streets away and the other pays retail plus courier. The category told you nothing. The supply chain told you everything.

Every list of profitable niches is a list of crowded ones. They're compiled from search volume, published to millions of people, and by the time a category appears it's been there two years and everyone acted on it. Search volume measures how many people are looking, which also measures how many sellers arrived.

Most of those lists are written by people selling you something else. A course, a supplier directory, a dropshipping subscription. Notice which categories always appear: cheap wholesale, high perceived value, easy fulfilment. The ones where the tool being advertised is most useful.

None of that means categories don't matter. It means the useful question isn't "what's profitable", it's "what can I get, deliver, and sell at a price my market will pay". Four filters, in order, because a product has to clear all four and most fail at the first two.

Filter one: what can you actually get

The unglamorous question that decides everything.

Whatever you sell, you'll need more of it next month, at roughly the same price, on roughly the same timeline. A seller who found a bargain once has had a good day. A seller who can repeat it has a business.

Ask these about any candidate, and get real answers rather than assumptions:

• What's the lead time from deciding to having it in your hands? Include payment clearing, production, freight and customs.
• What's the minimum order? Not the ideal order. The smallest quantity anyone will sell you.
• How stable is the price? Anything imported carries a currency risk you're not being paid to take.
• How many other people in your city buy from the same source? If the answer is "everyone", your differentiation has to come from somewhere else, and usually that somewhere else is your own time.
• What happens when they go quiet for three weeks? Because they will.

There are three fundamentally different answers to "where does it come from", and each has a different failure mode.

Where it comes from	What decides it	How it fails
You make it	Your hours, your materials supply, your skill	You run out of hours long before you run out of demand
You buy it to resell	Supplier reliability, minimum orders, capital	You tie up money in stock that stops moving
You already have it, or find it	Your ability to keep finding it	You have a great month and can't repeat it

That third row is where most resale businesses live and it's the one people underestimate. Sourcing thrifted clothing, second-hand phones or vintage furniture isn't a step before the business, it is the business, and the people who do it well are spending most of their week finding stock rather than selling it. How to sell thrift clothes online and how to sell used phones online safely both start from that reality rather than from the listing.

There's a fourth answer that sounds like it removes the problem entirely: let someone else make and ship it on demand. It does remove the capital and the stock risk, and replaces them with a thin margin and a delivery time you don't control. Print on demand without the hype does that arithmetic honestly.

Filter two: what can you actually deliver

The second filter kills more good ideas than the first, and later, which is worse.

The rule of thumb worth writing down: if getting one unit to a buyer costs more than about 15 to 20% of its price, the economics get hard and stay hard. Not impossible. Hard, in a way that shows up on every single order for as long as you do this.

Run each candidate through six questions.

How heavy and how big is it? Couriers price on both, and volume usually bites before weight. A restored armchair is a local-delivery business whether you wanted one or not. How to sell restored furniture is written around that constraint rather than around the restoring.

How fragile is it? Every fragile product has a packaging cost and a breakage rate, and the rate is never zero. Add both to your unit cost before deciding the margin looks good.

Is it alive or perishable? Plants, food, flowers and anything with a shelf life turn a delivery delay into a total loss rather than an annoyance. That doesn't rule them out. It means your courier choice and your cutoff times are part of the product design from day one, which is why how to sell plants online and how to sell baked goods from home spend so long on the box.

How many variants does it need? Sizes and colours multiply your stock, your photography and your returns. Apparel and footwear are the extreme case: the same product in eight sizes is eight products, and the ones that don't sell are the small and large ends of the run every time. How to sell sneakers online covers what that does to your money.

What's the return rate, honestly? Anything sized, anything where colour matters. A 20% return rate against a 30% margin means you're working for very little.

Can you legally send it? Liquids, aerosols, batteries, cosmetics, food, anything flammable. Couriers publish restrictions and they differ by service and destination. Check before you buy stock, not after.

Filter three: what are people already asking you for

This is the cheapest demand signal in existence and almost nobody counts it.

If seven people have asked whether you make something, you have seven people who might buy it and you didn't spend a rupee finding out. If nobody has ever asked, you're making two bets at once: that the product is wanted, and that you can find the people who want it. Two bets is how a year disappears.

Where the signal already lives:

• Your DMs. Scroll back three months and count the questions. Not compliments. Questions about availability, price, sizes, whether you do X.
• What people ask you to do for free. The thing friends ask you to help with is a service with demand attached. Baking, photography, fixing things, sewing, tutoring, doing someone's hair.
• What you already sell that people ask to buy more of. The easiest new product is a second version of the one that works.
• What's missing where you live. A gap you noticed as a customer is a gap you can describe accurately, which is worth more than a gap you read about.

That last route is how most durable small businesses actually begin. Somebody made something for themselves or a friend, someone else asked for one, and it happened twice. How to sell handmade jewellery and how to take cake orders online are both, at root, that story with the logistics attached.

And it applies just as much when what you sell isn't an object. Selling your hours has no sourcing problem, no delivery problem and no stock risk, which removes two of the four filters entirely. What it has instead is a hard ceiling, because you only have so many Saturdays. How to sell tutoring online and how to take bookings for a home service both start from that trade. And a commission-based creative practice sits in the same shape, with the added problem of quoting for work whose scope moves: how to sell art commissions online is about pricing that honestly.

Nobody has ever bought something because it was on a list of profitable niches. Somebody asked you for something, twice. Start there.

Filter four: what does your market actually pay

Not "is there demand". Demand at what price, in your city.

Every product has a local ceiling, and it's set by what people near you already pay for the nearest equivalent. The same handmade bag is a ₦9,500 product in one market and a £48 product in another, and neither price is wrong. Find yours by looking at what's actually selling around you rather than what's listed.

Then price your candidate against that ceiling and see whether there's room for you. Work out the full cost per unit including materials, packaging, delivery, payment fees and a real number for your own time. If the ceiling is $18 and your all-in cost is $14, that's not a business, that's a hobby with paperwork. If it's $18 against $6, you have something.

The test people skip: sell one at your real price before you commit. Not at a launch discount, not to a friend, not "at cost to build reviews". At the price you'd need forever. A product that only sells at 30% off has told you its ceiling and you weren't listening.

Ope in Ibadan, three candidates, one table

Ope has ₦200,000 saved, a sewing machine, a day job she's leaving in six months, and three ideas she's been going round in circles on.

She wrote them out properly. This took an afternoon.

	Imported phone cases	Ankara laptop sleeves she sews	Saturday sewing classes
Source	Overseas supplier, 200 minimum	Fabric from Gbagi market, 2 days	Her own hours
Money needed up front	₦180,000	₦18,000 for one bolt	₦0
Lead time	About 6 weeks	2 days	None
Cost per unit	₦900	₦2,100	₦800 of materials per student
Price	₦2,500	₦9,500	₦6,000 per student
Delivery and packaging	₦700	₦900	₦0
Margin per unit	₦900	₦6,500	₦5,200
How many she can do a week	40, limited by packing	9, limited by sewing	6 students, one Saturday
Weekly ceiling	₦36,000	₦58,500	₦31,200
Other sellers doing it in Ibadan	About a dozen she can name	Two	One she knows of

The phone cases were the idea that felt most like starting a business. They're the worst of the three. Nearly all her capital, a six-week lead time, twelve competitors, the lowest weekly ceiling, and every naira of risk sitting in a box in her room until it sells.

The sleeves have the highest ceiling and the lowest entry cost, and the constraint is her hands, which is a constraint she can do something about later by training someone. Nine a week at ₦58,500 is ₦234,000 a month before her own pay, from an ₦18,000 start.

The classes have no stock risk at all and produce cash the same day, but they cap out at her Saturdays and her spare room, and they don't scale without a bigger room and more Saturdays.

What she actually did: ran the classes to fund the fabric, sold sleeves to the students, and never ordered the phone cases. Eleven months later the sleeves are the business and the classes are a marketing channel she gets paid for.

The point isn't her answer. It's that the table took one afternoon and replaced eight months of circles.

The categories that punish beginners

Say this plainly rather than pretending all products are equal.

Anything regulated. Cosmetics, skincare, food, supplements, children's products, anything with food contact. There are safety, testing and labelling obligations in most countries, they exist from your first sale rather than from some threshold, and they're specific to what you make and where you are. Find your own country's rules before you scale production, not after. That isn't a reason to avoid these categories, and people build excellent businesses in all of them: how to sell skincare online and selling home cooked food online are both written by people who took the compliance seriously rather than hoping.

Anything sized. Returns, stock spread across a size curve, and a support load that scales with orders rather than revenue.

Anything with authentication risk. Sneakers, luxury resale, anything counterfeited. You take on the job of proving what you sell is real, and one mistake is a public one.

Anything with a warranty tail. Electronics you didn't make. The sale ends when the product does, not when the parcel arrives.

Anything where the buyer is buying a promise. Pre-orders, custom work, made-to-measure. Fine businesses, but the cash arrives before the work does, and that gap is where small shops get into trouble.

The three-week test that costs almost nothing

Stop researching. This produces an answer rather than more options.

Week one. Pick your top three candidates. For each, find the actual source and get a real price for the smallest quantity anyone will sell you. Take one decent photo of the real thing, or of a sample, or of the closest thing you can hold. Write a price you'd be happy with forever.

Week two. Show the three to twenty people you can name individually. Not a public post. Twenty messages, one question: "would you buy this at this price?" Then ask the ones who say yes to actually buy it, now, as a pre-order with a date. Money is the only signal that counts.

Week three. Fulfil whatever you sold, badly, by hand, and time yourself. How long did one unit take to make, pack and send? What did the postage actually cost? What went wrong? That week produces numbers you cannot get any other way, and it's why presales beat surveys by a distance.

At the end of three weeks you either have orders or you have three products nobody wanted, and both outcomes cost you almost nothing. Compare that to buying 200 units on a hunch.

What Sailo does here, and what it can't

The honest version.

Sailo can't tell you what to sell and neither can anything else. What it does is make the three-week test cheap: a link at sailo.store/yourname that's live at signup, $0 for the free plan, and no commission at all on bank transfer, cash on delivery, or orders handed off to WhatsApp, Instagram, Telegram, email or phone, because Sailo never touches that money. A WhatsApp order arrives pre-written with the item, options, address and total, which is what you want when twenty people message about a pre-order in one evening.

The free plan caps at 10 products, and for this specific decision that cap is closer to a feature than a limit. If you're choosing what to sell, you should have fewer than 20 things, not more. Shops that sprawl to 60 SKUs in year one are usually shops that never made this decision at all.

Three limitations worth knowing before you plan around it.

Card payments need a Stripe account Stripe has cleared for charges, and Stripe isn't launched in every country. On the free plan and on Pro at $19, there is no card. If your market expects card, budget for that from the start.

There's no mobile money rail. No M-Pesa, no GCash, no UPI, and no Paystack whatever you read elsewhere. Sellers put a till number or a UPI ID into the bank transfer instructions field and it works, and that's a workaround rather than a feature. Sailo also can't tell you a payment arrived. Only your bank can.

And Sailo will never send you a customer. There's no marketplace, no directory, no discovery. Every visitor arrives because you sent them, which means the "what should I sell" decision and the "how will anyone find me" decision are two separate pieces of work, and the second one is the harder of the two.

What to do this week

Write three candidates down. For each, answer one sourcing question and one delivery question honestly: what's the smallest quantity anyone will sell me and how fast, and what does it cost to get one to a buyer intact.

Two of the three will collapse on those two answers alone. That's the filter doing its job.

Then take the survivor and ask twenty people you can name to buy one at the price you'd need forever. Not to like it. To buy it. Whatever happens in that conversation is the answer, and you'll have it inside a fortnight rather than inside a year.