Sixteen chapters on how resale actually works: the margin equation, how to derive a maximum buy price, why fast stock beats fat margins, where stock comes from, how sizes quietly kill portfolios, and how to measure whether any of it is working. Free, no signup, no email.
It is written from the same dataset that powers the product — 6,518 items we watched leave the shelf in the last seven days across 26 tracked brands on Vinted ES, FR, DE, IT and PT — so the claims about how the market behaves are grounded in the dataset, with its limits named.
The arithmetic that decides whether any of this is worth doing.
The full margin equation for Vinted resale — buy price, platform fee, shipping, returns and time — and why most resellers only track the first two.
Deriving a maximum buy price from the expected sale price, the platform fee and your target margin — the single calculation that separates sourcing from shopping.
Why a category selling thousands of units a week can still be a bad place to put your money, and how to tell demand from saturation.
Capital turns explained — how a 20% margin that clears in three weeks outperforms a 60% margin that takes six months, and what that means for what you buy.
Where stock comes from and how to judge it before you pay.
The four supply channels for resale stock — charity and thrift, wholesale and bales, retail clearance, and platform-to-platform — with the real cost and risk of each.
What underpriced listings have in common, which signals are real and which are traps, and how to check a find in under a minute.
Why size distribution matters as much as brand demand, how edge sizes turn good buys into dead stock, and the sourcing rule that follows from it.
A practical grading approach, which defects are economically fatal, and how to handle commonly-counterfeited brands without becoming an expert authenticator.
Turning inventory into money at the speed you planned for.
Setting an opening price that leaves room to negotiate, running a disciplined markdown schedule, and knowing when a price cut is cheaper than waiting.
The listing work that actually moves the needle — searchable titles, a repeatable photo set, and descriptions that reduce returns rather than sell.
How visibility, bumps, offers and buyer messaging work in practice, and which of the levers are worth paying for.
We measured how much Vinted's ES, FR, DE, IT and PT catalogues overlap. Most listings appear on several domains at an identical price — which means the country-arbitrage playbook does not work the way it is usually described.
Cashflow, measurement, scale and the rules you sit under.
How much stock to hold, why profitable resellers still run out of money, and the simple discipline that prevents it.
A minimal measurement routine — sell-through, days to sell, realised margin, cash conversion and unlisted backlog — and what each one tells you to change.
What breaks between 20 and 200 listings, why the constraint is throughput rather than capital, and the systems that have to exist before volume goes up.
A plain-language overview of DAC7 platform reporting in the EU, the hobby-versus-business distinction, and what records to keep. Not tax advice.
Chapter 2 shows you how to derive a maximum buy price. Doing it by hand for every model across five markets is the part that does not scale — that is what Resale IQ computes for you.