Bookselling ?

Over the years Ive managed to get ahold of some fairly valuable volumes, first edition, first printings. Ive looked some of these up on Abebooks and a few are listed in the low 4 figures. Im looking to start selling some of these and was wondering if anybody here was knowledgable on this.

Is it better to search for a dealer, and get less than 50% of what he will markup or would Ebay or something similiar be a better route?

A martial arts website is clearly the correct place to pose this question imo.

Just being a dick.

Of course Ebay, why give away your profit?