Posted By:
Jim VBSkydash,
The first question to ask yourself is "What do I want to do with these cards?"
If you are interested in selling them, I agree with Jay. Robert Edwards Auctions is above reproach. They will either travel to you, or have you securely send them the cards. They will take a cut (probably 20%) when they sell them, but they (or a couple of other major auction houses), will easily be able to get you the best price.
If you want to keep the cards, but are just curious about their value, use this board to find someone fairly local to give you some idea of their worth. Don't accept any offer from any of us to buy them. (Just kidding, sorta.)
If you want to get a general idea, on your own, buy a copy of the latest Price Guide from Krause Publications or Beckett's. You'll have to catalog every card and estimate condition, but these list every card so you can find out if you have something valuable. Cards from this set have sold for every price from $5.00 to $2,200,000. The books cost about $40 and are usually available at any Barnes & Noble or at Amazon. Don't do anything rash.
Good luck.