About

SPI Markets

SPI Markets is the Sneaker Price Index (SPI) plus a board of asks — so you can see if the market is cheap or rich vs retail, check deals on pairs, and track what you own or wear. Independent of StockX.

Who built this

John Scarpelli · Founder

Built for people who wear and collect sneakers. I got tired of bouncing between StockX tabs, screenshots, and spreadsheets just to see prices and what I own. SPI Markets started with the Sneaker Price Index (SPI) — then grew into a board, Collection (portfolio + wardrobe), and the tools around them. Clearer numbers, less noise.

Questions or ideas? Contact me below.

What’s on the site

Collection — Portfolio value and wardrobe fits — what you own and wear, one account.
Price board — Top sellers with size asks, charts, compare, and deal check — cop / stretch / pass from the board.
Sneaker Price Index — One number for how expensive the market is vs retail. 100 ≈ retail — something a single StockX page can’t tell you.

Tools on the board

Compare — Type to search any pair (catalog only after 2+ characters) or quick-pick top sellers — stack up to five on ask, retail, premium, and flow.
Deal check — Search any pair when you type — or pick a top seller — then size + offer → cop, stretch, or pass.

Index · Markets · Collection — SPI, asks, and what you own or wear.

Data — we keep it honest

When live market access is on, prices refresh from connected data providers. Otherwise SPI Markets serves a daily snapshot (last refreshed 2026-07-29) so the board stays usable without hammering feeds on every click.

You may see a Snapshot badge instead of Live — that's intentional. We'd rather be clear than fake realtime.

How the SPI index is calculated →

Contact me

Feedback, shoes to add, thoughts on SPI or the board, or a Plus Lightning invoice request — I read every message. Leave your email so I can reply; it is never shown publicly.

Disclaimer

SPI Markets is an independent project. It is not affiliated with, endorsed by, or partnered with StockX. Market data can be delayed, incomplete, or snapshot-based. Not financial advice — do your own research before buying or selling sneakers. Deal check is a relative read vs this board, not a recommendation to buy or sell.