A pair of sneakers can sell instantly at several times its retail price, then drift downward for months. Both movements come from how the release was allocated rather than from anything about the shoe.
Limited allocation creates the gap
Brands release certain models in quantities far below expected demand, distributing them through raffles and app draws rather than open sale.
Retail price is set in advance and does not adjust to demand, so the entire imbalance between buyers and pairs resolves in the secondary market instead.
The size of the premium therefore measures how far the release quantity fell below demand, which is information the brand holds and the market only infers.
Restocks and general releases reset the picture
When a brand later restocks a model or issues it in a wider release, supply rises against unchanged demand and the premium compresses quickly.
Because restocks are rarely announced far ahead, resale prices carry a persistent risk that supply will change without warning.
Sellers holding inventory watch release calendars closely for this reason, since the value of stock can fall on an announcement rather than on a sale.
Size curves distribute demand unevenly
Production runs follow a size curve weighted toward the middle of the distribution, so common sizes are relatively plentiful and extreme sizes are scarce.
Demand does not follow the same curve, which is why the same model can command different premiums across sizes on the same day.
Marketplaces list prices by size for this reason, and a headline resale figure usually refers to one specific size rather than the shoe generally.
Authentication is a real cost inside the price
Because counterfeits are sophisticated, major platforms route pairs through verification centers where trained staff inspect construction, materials and packaging before releasing payment.
That process costs money and time, and platform fees reflect it. It also adds days between purchase and delivery, which the buyer pays for in convenience.
Private sales avoid the fee and carry the authentication risk instead, which is why identical shoes trade at different prices across channels.
Condition and completeness are graded categories
Deadstock describes an unworn pair with original box and accessories, and it is the reference condition against which other listings are discounted.
A missing box, a replaced lace set or yellowed midsole all move a pair into a lower category, sometimes sharply, because collectors treat completeness as part of the item.
Aging is a factor independent of wear, since adhesives and foams degrade over years, which is why very old unworn pairs can be fragile despite grading as deadstock.