How Prospect Card Radar works
Where the numbers come from, how often they update, and what they can’t tell you.
The card we price
Every headline price is the raw base Bowman Chrome 1st Bowman autograph from the player’s first Bowman year. Parallels, graded slabs, later-year reprints and other products are left out, so one prospect’s price compares fairly with another’s.
Sold prices
Sold prices come from SportsCardsPro, matched to the exact card and year. We only show one when the card has at least 3 recent sales; with fewer, we say so rather than show a number. Wherever both exist, the sold price leads.
Asking prices
Asking prices come from live eBay listings. We drop the top and bottom 10% and average the rest, so one $999 wish or a $1 typo can’t move it. Fewer than 8 listings is marked limited sample. An asking price is what sellers want, not what anyone paid.
Ended listings
Listings that disappear from eBay keep their last asking price. They might have sold, been relisted or expired, so we label them recently ended listings and never call them sales.
Rankings
The Top 400 blends MLB Pipeline and FanGraphs, with Pipeline counted twice. Baseball America is added when its list is current. The list rebuilds every day: players graduate off it when they debut, and new draftees and signings join it.
Stats
Season lines come from MLB’s Stats API, combined across every minor-league level a player reached that year.
Hitting, power, plate discipline and speed. Our hitting number is an OPS-based score where 100 is average. It is not true, park-adjusted wRC+.
Strikeout rate, walk rate, strikeouts minus walks, and FIP.
Mismatch Map
- Across: how a player’s stats rank against other hitters, or other pitchers, from 0 to 100.
- Up: how their card price ranks against every other card.
- Grey band: within 20 points, stats and price are in line. Outside it, they disagree.
A gap is a starting point for your own research, not a buy or sell call. Open the Mismatch Map
Deals
A listing counts as a deal when it’s at least $5 below the same card’s sold price. Bowman’s Best and Bowman Sterling are left out of deals. Most days most cards have no deal, and that’s the honest result.
Update schedule
| What | How often |
|---|---|
| Top 100 asking prices | |
| Everyone else’s asking prices | |
| Sold prices | |
| Stats | |
| Rankings |
What it can’t do
Lower-ranked prospects can have very few listings, so their prices move more.
Title matching can file a listing under the wrong card. We drop what we can’t classify.
A raw card’s condition can’t be judged from a listing photo.
Short stat lines and rookie-ball numbers are flagged where they appear.
How the site makes money
We earn a commission from the eBay Partner Network when you buy through our eBay links. It never changes which cards we show or how we rank them.
Spotted something wrong? Tell me on X. More about the site on the About page, and the raw data on the data page.
Questions
Where does Prospect Card Radar get its prices?
Sold prices come from SportsCardsPro, matched to the exact card and first Bowman year, and only with 3 or more recent sales. Asking prices come from live eBay listings through eBay's official API, averaged after dropping the top and bottom 10%.
Which card is priced?
The raw base Bowman Chrome 1st Bowman autograph from the player's first Bowman year. Parallels, graded slabs, reprints and other products are left out of headline prices.
How often do prices update?
Top 100 asking prices every 6 hours, everyone else daily. Sold prices refresh through the day. Stats and rankings update daily.
Where do the rankings come from?
A blend of MLB Pipeline and FanGraphs, with Pipeline counted twice, plus Baseball America when its list is current. Rebuilt daily.
What does the Mismatch Map show?
Each prospect's stats rank against their card price rank, both from 0 to 100. More than 20 points apart means stats and price disagree. It is a starting point for research, not a buy or sell call.
Are recently ended listings sales?
No. A listing can end because it sold, was relisted or expired, so ended listings keep their last asking price and are never shown as sales.
Last updated Oct 19, 2026