First-party comps
Build your own book
TheBattleDex no longer pulls from any third-party price guide. Sales live in your database. Log comps as you see them — breaks, eBay solds, Goldin hammers, Discord deals, in-hand trades. Pulse, Breaks, and Browse update from this ledger.
Log sales here
Every row you add is yours. Use it during a Whatnot show or after you screenshot a sold listing.
Connect eBay legally
Create an app at developer.ebay.com, apply for API access, then send the App ID / cert. Sold comps need their restricted sold-data approval — not scraping.
Whatnot & Goldin
Whatnot Seller API covers your shop, not the whole hobby. Goldin is auction results you log by hammer + date. Discord and shows stay manual or community-submitted.
Log a sale
Price, player, set, platform, date. That is enough to rank a break board and a Pulse number.