So how did you price your books.....find a price on bookfinder.com and double it or treble it?

The text books may be expensive but your pricing for readily available novels is crazy.

You have priced Angels and Demons by Dan Brown at $40 for a used book.....I can buy it new from an online seller for$17 with free postage.

You are asking $38 for Fox Evil by Minette Walters.....available for $10.59 online, new.....less than you are asking for postage.

If you really want to make sales you will have to look at your pricing....buyers will not pay the prices you are asking, especially for used books.