Profit
Revenue is easy to see and profit is easy to overestimate. This hub breaks down the numbers that sit between the two: marketplace commissions and buyer-paid fees, shipping and return costs, promotion spend, currency conversion, and the DAC7 reporting thresholds that apply across the EU. Fee facts are taken from official marketplace pages and dated, because they change often. Use it together with the calculators to see what a flip really earns.
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Guides

A simple way to score resale risk before you buy: downside if it does not sell, cash days at risk, fakes and faults, and a two-minute checklist.
7 min read
Profit is not cash. How resellers get trapped in stock, how to measure your cash conversion cycle, and rules that keep money moving, not sitting.
7 min read
Seller and buyer fees on Vinted, Allegro Lokalnie and OLX in zł: worked 100 zł and 1,000 zł examples for Vinted and Lokalnie, and what OLX doesn't publish.
10 min read
What DAC7 means for resellers on Vinted, OLX and Allegro: the 30-sales or €2,000 trigger, what platforms collect, blocked payouts, and why it isn't a tax.
8 min read
How much do resellers make per hour? A method to time every step of a flip, turn profit into an hourly rate, compare it with a job and raise it.
8 min read
Sold personal items within six months in Poland? How to count the half year, calculate income minus cost, report a loss on PIT-36 and file by 30 April.
6 min read
Why one target margin does not exist in reselling, and the three numbers worth knowing instead: margin per item, per day, and after hidden costs.
5 min read
The reselling costs that don't show in the headline fee: promotions, return shipping, packaging, currency conversion, failed sales and your time.
9 min read
Do you pay tax selling on Vinted in the UK? Personal items vs trading, the £1,000 trading allowance, the 30-sale reporting rule and HMRC registration.
7 min readStart with reva
One place to find underpriced items, check their market value and act before someone else does.
