what's the best way to sell large collection of books?

i have a massive collection of books which include old, new, hard cover, soft cover, scholarly, classics, cookbooks, you name it. i have no idea what to do and thought maybe the great posting members have some suggestions. Is ebay an option or amazon? I am assuming media mail the way to go on shipping. thanks for any suggestions!
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looking for PELLE LINDBERGH's psa and 1960 fleer baseball psa 8 and up
sets in progress
R.I.P. Barstow 24 April 1999 - May 15 2009
1996 Select Certified Mirror Gold Ozzie Smith
2006 Bowman Chrome Orange Refractor Chris Carpenter
artist_lost@hotmail.com
mathew
drugs of choice
NHL hall of fame rookies
abes
alibris
Raw: Tony Gonzalez (low #'d cards, and especially 1/1's) and Steve Young.