with the recent ebay policies and prices, I don't think it's worth listing them on ebay. you won't get mad prices and most of what you get will be scooped by ebay/paypal.
but of course there are a lot of ppl insterested in the books on the boards, so just offer them for what you think they're worth (and maybe a little bit less if in general you overvalue your books) so other ppl can give them a good home.
also be sure to check
amibay