Specifically the 82-83 players and 84-85 OVRs.
They’re in Team Builder Sets so they shot up. It might drop soon though, so do this fast!
Previous prices:
82-83: 2-3k
84-85: 3-5k
What to sell for (make sure it’s on 1 hour, those show up fastest)
82-83: 8-9k
84-85: 8.5-10k
Good luck!