I will be happy to assist you with this question, but I need to know what you may be looking for.
Do you have Rookie Cards of some of the players?
Do you have certain sets ie: Topps, Skybox, Hoops, Classic etc?
Are you talking specialty cards or autographs?
I have checked and found some of the higher dollar cars are :
Keith Van Horn
If you have specific cards that you would like an idea of what they are worth, please let me know and I will see if I can locate the price for you.
All the cards are based on condition, grading and if they are inserts many of those are bringing higher dollar amounts.
Please let me know if I can further assist you.