Best way to sell your cookbooks?
Amazon? Ebay? Local Used bookstore?
I had pretty good luck a few years ago on Amazon & Half.com. I didn't list every cookbook I wanted to get rid of, but I did a quick search and put up all the ones people seemed to be interested in buying. I sold every one I listed (over the course of two or three months). The rest I donated to my local library. My kitchen bookshelf is manageable now. :)
If you sell online, remember to take the size/weight of the book into account when pricing. The shipping reimbursements don't always cover the actual shipping price.