Posted By:
Eric BrehmIt is worth about $2000, give or take a few hundred, depending on how nice the card looks for its assigned grade, and as Paul said, whether or not it has an unusual back type (tobacco brand advertising) sought by collectors. PSA's own price guide currently lists the value at $1750.
T206 Cobb Red Portrait PSA 5 sells frequently on eBay, about once every other week on average. If you don't have the computer skills or the inclination to sell it yourself, there are many folks in the hobby who will happily list it on eBay for you, and handle all aspects of the transaction with the buyer. You can expect a sales commission rate in the 10% to 15% range for that service.
If you are not in a hurry to sell the card, you can also consign it to one of many sports memorabilia auction houses that run auctions periodically during the year. Most offer on-line bidding to their client base and mail out a nice catalog as well. Commission rates are mostly in the 15% to 20% range for that type of consignment.