PSA grades cards every single day. Cardboard Cove tracks population counts, price estimates, and sell signals — so you hear about it first, not when it's already too late.
Free for 3 cards. No credit card.
Most collectors find out a pop changed when they go to sell and the comps don't add up. By then the damage is done.
You paid $2,800 for a PSA 10 RC at pop 14. Six months later it's at pop 67. You're still asking $2,800. It's worth $900.
Pop crosses 50. The market drops 30% that week. You check manually every few weeks. You saw it at pop 71.
You pick up a card at a show. Pop looked fine last month. Nobody mentioned 40 came back from PSA the morning before.
You need one thing: the cert number from your slab label.
The 8-digit number on your PSA slab label. We pull the card details from PSA automatically — grade, year, player, set.
Every day we pull the population report and PSA price estimate. We calculate weekly growth rate and flag when supply is accelerating.
Pop moved? Price dipped below your target? Velocity crossed into sell territory? Telegram message hits your phone. Before and after. One tap to act.
Four signals. One dashboard. You decide when to move.
Any time PSA grades more copies of your card, you hear about it. Increase or decrease — you see the before and after immediately.
We calculate weekly growth rate and acceleration. When supply is flooding in, you get a sell signal — not a lagging market comp.
Set a floor price. When PSA's estimate dips below it, you get an alert. Great for timing buys and protecting your cost basis.
"Alert me when pop hits 50." One-time precision alerts so you can plan your exit at exactly the right pop number.
Straight to Telegram. Three seconds to read.
📈 Pop Alert: PSA 10
2003 Topps Chrome Derek Jeter #175
Population changed
One missed pop alert on a $1,000 card costs more than a year of the paid plan.
Every card graded by PSA has a unique cert number printed on the label inside the case. It's typically 8 digits. You can also find it at psacard.com/cert.
Once a day, every day. PSA usually processes new grades within 24–48 hours of grading, so daily checks catch everything.
A pop increase alert fires any time the count moves. A threshold alert fires once — when pop crosses a specific number you set. Useful if you want to sell before pop hits 50.
PSA only for now. BGS and SGC support is on the roadmap.
Yes. Enter any cert number you can find on psacard.com. A lot of buyers use it to watch a card before purchasing — know what pop you're actually buying into.
You revert to the free tier (3 cards). You can delete your account and all data at any time from settings.
Add your first card in under a minute. First alert arrives tomorrow morning.
Watch my cards free3 cards free. No credit card.