no blue book, the bow and what shape its in. cables & string, rust, finish, etc. high dollar bows less than good low end bows. someone looking for used equip. is not looking to spend $550.00 on used hoyt or mathews when they can get a new PSE Beast for $250.00. arrows and most hunting sights are of no trade-in value and only the best of arrow rest add to the price. no matter how new and how good cond. a current year model will be below whole sale. basicly this is the gauge we start with. jim