The Second Price

Until about ten years ago a brand controlled the only published number attached to its product. There was a retail price, and there were rumours among collectors about what things changed hands for, and the rumours were not data.

Resale platforms turned the rumour into a quote. A sneaker, a bag, a watch now has a visible second price, updated continuously, which anybody can look at before deciding whether the first price was fair.

This is a larger change than it sounds, and the first thing to be clear about is what the second price measures.

It measures the gap between supply at retail and demand at retail. Nothing else. If a shoe retails at two hundred and resells at six hundred, the brand released too few at too low a price for the demand that existed. That is a quantity and pricing finding. It is not a compliment about the design, and it is not revenue: the brand collects none of the four hundred.

Which is why a resale premium is read two ways by two different departments. Marketing sees proof of desirability. Finance sees four hundred pounds a unit going to somebody else.

Some brands have decided the premium is worth more than the money, and run on that basis. Hermès caps how many quota bags a customer may purchase in a year. The consequence is predictable and well documented: Birkins in the sought-after sizes and colours trade above boutique retail, consistently, year after year. The restriction is the mechanism, and the premium is the readout on the dial.

Note that the effect is not uniform even there. The largest Birkin sizes trade well below retail, because allocation restricts supply of what people want rather than of everything. Scarcity only produces a premium where there is demand to be frustrated.

The second thing to understand is what the platforms actually sell.

They sell trust. A resale market cannot function if buyers believe they may be wiring money to a stranger for a fake, so the platforms authenticate at industrial scale, inspecting over a million items a month in StockX's case, and reject what fails. Counterfeits are a meaningful share of rejections and manufacturing defects are a larger one.

The authentication is the product. The marketplace software is commodity; the ability to say this is genuine and stand behind it is not, which is why the fee survives and why brands have sued over how the authentication is described.

And the third thing is that the public price cuts both ways.

A brand that benefits from visible premiums on its good releases also gets visible discounts on its bad ones. Collaborations have been found trading below retail within a week of launch, in public, on a site anybody can refresh. There is no way to ask people not to look, and a secondary market trading at sixty per cent of retail is a verdict delivered faster and more credibly than any review.

This is the Supreme drop with a published order book, and the mechanism was always there. What changed is that the scoreboard is now outside the building.