If you search the card on eBay, it maxes out at $34.99, but mine does not seem to be in the best quality. As far as selling my cards in general, I haven't really thought about doing it yet. I think that eventually cards may get valuable again, but aren't right now because they are so popular.
Having a collection like mine is fun to keep track of and look through every once in a while. I have around 10,000 cards including hundreds of Yankee cards ranging from 1960 to the present.