Data study · Oct 27, 2026
How the sneaker resale study is built
The study combines two kinds of data: the resale sales that sellers record in RestocksAIO, and public marketplace prices that RestocksAIO collects. This page lists each data set, the months we use, the rules that protect sellers and the limits of each figure. This edition is dated Oct 27, 2026.
Data sets and periods
The table lists the four data sets, the period of each and what the study uses it for.
| Data set | What it holds | Period used | Used for |
|---|---|---|---|
| Recorded resale sales in RestocksAIO data | Each sale a seller records: marketplace, style code, US size, payout, currency, date and, from 2022, part of the sale prices | 1 Jan 2019 to Oct 26, 2026; 2026 is partial | Brand, model, marketplace and size shares; payouts; days from release to sale; volume |
| StockX sale prices (RestocksAIO price data) | Public sales points of the styles that RestocksAIO users open, in EUR | Jan 2021 to Apr 2026 | The same-style price index and the fade of the top 200 styles |
| Alias asks (RestocksAIO price data) | The lowest ask per style and size, in USD | One day: Oct 26, 2026; 42,582 styles | Asks against US retail per brand |
| Product catalogue | Brand, product name, release date and US retail price per style code | As of Oct 26, 2026 | Brand, model, retail and release date of each sale |
Usable months
- Recorded sales: every month from January 2019 to Oct 26, 2026. 2017 and 2018 are too small for most cells, and 2018 serves only as the base of the volume index.
- StockX sale prices: January 2021 to April 2026. The collection fell from January 2026 and was under a tenth of its December 2025 level from June 2026, so May to October 2026 is not used.
- Alias asks: the snapshot of Oct 26, 2026 only. Earlier Alias ask series have collection breaks in June and August 2026, so the study shows no Alias ask trend.
- Monthly counts of marketplace sales points follow the styles that users open, not the market, so the study never shows them as market volume.
Rules for customer figures
- Read-only access. Admin accounts and sellers who keep their sales anonymous are out of the data.
- The 10-seller rule: a cell (a year, a quarter, a brand, a marketplace or a size) needs 10 or more distinct sellers. A smaller cell is suppressed and shows as a dash.
- Customer figures appear as shares, medians, ratios and indexes only. The study publishes no count of sales or sellers, no money total and no seller identity.
- A share under 0.5 % folds into Other, so no table shows a 0 % row.
- One seller's weight: the largest single seller made between 3 % and 18 % of a year's sales since 2019. The main shares do not cap that seller. We checked each turn with seller-balanced shares, where every seller counts once, and every turn in the brand and marketplace shares holds.
- The same-seller panel holds sellers with 20 or more sales in both years of a pair of years. It shows the median change of those sellers.
Index bases and definitions
- Volume index: the first full year is 100 (2018 = 100). The page shows it as a percentage of the 2022 peak, because the 2018 base is small and the index numbers look extreme.
- Same-style price index: January 2021 = 100. Each month compares the median StockX EUR price of the styles sold in both months, without consignment sales, and chains the median change.
- Brand: the catalogue brand. A name with Jordan counts as Jordan, and a name with Yeezy counts as Yeezy, so adidas excludes Yeezy. Model families come from product names, and grade-school and women's sizes count with the model.
- Days from release to sale: the sale date minus the catalogue release date. For long-running models, the catalogue date can be the date of the first colourway. 11 to 27 % of sales per year have no release date and are out of these figures.
- Size: US sizes as recorded. The payout of a size is compared with the median of the same style, currency and year, where that style has 20 or more sales.
Currency
No figure converts a currency. The median EUR payout uses sales paid in EUR. Ratios to retail use sales paid in USD and the US retail price of the same shoe, so both sides are in the same currency. Alias pays out in USD to every seller, so USD sales are mostly Alias sales and include European sellers. Seller country is not known.
The StockX caveat
StockX prices come from a VAT-registered seller view and can sit a median 16 % below the consumer price. The share of that view in the StockX data rose between 2023 and 2025, which explains at most about 2 points of the fall in the price index.
Updates
This is the first edition. We plan a new edition once a year, after a full year of recorded sales. The price series will extend only when the collection runs again without breaks. Each edition gets a new date, and corrections are listed on this page.
How to cite
Free for editorial use with a link to RestocksAIO. Quote the figure with its date, for example: “The median payout of a resold pair fell from 208 EUR in 2019 to 101 EUR in 2025 (RestocksAIO, How sneaker reselling changed 2019 to 2026, Oct 27, 2026).” Link the words to the study page.
The charts are PNG files and the tables are one CSV file. Each chart carries its title, date and source. Questions and corrections: hello@restock.gg. Back to the study · Download the data (CSV)
RestocksAIO is listing, repricing and sales software for sneaker resellers, made by Reactive Systems SL in Ibiza, Spain. It has 8,000+ resellers and 275 million EUR in sales volume.