Almost everyone who starts reselling tracks two numbers: what they paid and what it sold for. The gap between them feels like profit. It is not. It is revenue minus cost of goods, and there are four more subtractions between that figure and the money that stays in your account.
Profit on a single item is the sale price, minus the platform's cut, minus whatever shipping you absorbed, minus the buy price, minus the share of your losses that this item has to carry. That last term is the one that gets skipped, and it is usually the one that decides whether the month was profitable.
Losses are not optional. Some items never sell. Some sell after four price cuts. Some come back as returns or disputes. If you sell 100 items and 12 of them end up at or below cost, the other 88 are paying for those 12 whether you account for it or not. A reseller who thinks they are running a 35% margin and is actually running 24% will keep reinvesting at prices that cannot work.
A 50% margin on a €10 item is €5. A 20% margin on a €120 item is €24. Percentage margin is useful for comparing two items of similar price and useless for deciding where to put your money. What you are actually optimising is euros of profit per euro of capital per week — margin and speed together, never margin alone.
This is why volume brands and premium brands are different businesses rather than better and worse versions of the same one. High-volume, low-price stock returns small amounts quickly and forgives mistakes. Premium stock returns larger amounts slowly and punishes them. Both work. Mixing them without noticing which one you are doing does not.
You control exactly one number in the equation. You do not set the platform fee, you cannot make a buyer pay above market, and you can only influence sell-through at the margins. The buy price is the whole of your control surface, which is why professional resellers obsess over it and hobbyists obsess over the sale price.
Every mistake in judgement — wrong size, wrong season, condition worse than it looked, demand softer than you thought — is survivable if you bought low enough. None of them are survivable if you paid close to retail resale value and planned to make it up on a strong listing.
There is no universal figure, because it depends on how fast the item turns. As a working rule, price-tier stock that sells in under three weeks can justify a thinner margin than stock that takes two months. Resale IQ's buy-below price targets a healthy margin after fees for the specific model rather than applying one blanket percentage.
If you want an honest picture, yes. Photographing, listing, answering messages and packing is roughly ten to fifteen minutes per item once you are practised. At any sensible hourly rate that makes very cheap items marginal, which is why experienced sellers raise their minimum item price long before they raise their volume.
Resale IQ turns a Vinted listing into one answer: BUY, WATCH, or SKIP — with buy-below price and best sizes.
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