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Mattjay - you should look on ebay to see what the values are in different conditions - you can try a few of teh cards that you mentioned to get an idea.
You'll have to decide how much time you want to invest into selling them; to maximize your dollars, youd be best going through the submission process to a grading company and then listing them on ebay one by one. That process will take 6-8 weeks or so (assuming you don't splurge for the express service) and will cost several hundred dollars up front, but you'll make it all back.
If you're willing to compromise on bottom line for the sake of expediency, you can probably find people on this board (Including myself) who would be happy to make you offers on the lot.