Prospect Card Radar tracks live eBay asking prices for the top 100 MLB prospect cards across every major product line. Unlike price guides that rely on stale data or just graded comps, this shows what cards are actually listed for right now, both raw and graded. Compare two products side by side for the same player, track how prices move over time with trend charts, and click straight through to eBay listings. Free, no sign up, no paywall, no ads.

I collect baseball cards and I kept having 20 eBay tabs open every night trying to compare prices on different prospect cards. Bowman Chrome vs Pro Debut, raw vs graded, who's going up, who's going down. It was a mess. So I built this. It pulls live prices from eBay's API for every top 100 MLB prospect and puts everything in one place. You can compare products side by side, see how prices trend over time, and every listing links straight to eBay if you want to buy. I'm a designer with no coding background, built the whole thing using AI (Claude) as a way to teach myself to code. It's one HTML file deployed on Vercel. First month it drove over $4,400 in eBay sales through the affiliate program. It's completely free, no sign up, no paywall. Would love feedback from anyone who collects cards or is just into niche data tools. What would make this more useful?

@reqwium Congrats on the launch!

Love the focus on real-time listings instead of stale comps. This feels super useful for collectors.

How are you deciding which players and products to track next?

Prospect Card Radar

Price tracking, trends, and comps for MLB prospect cards

Price tracking, trends, and comps for MLB prospect cards