From what I've seen around here and on ebay , even with "the big three" the average drop in price on a resale is no less than $50. Most folks will just buy brand new unless they think their getting a great deal. I will admit the big three hold much better value on resale even on a bow thats a few years old.
If I could get my hands on a 05 Bowtech for $100 cheaper than I'd pay around here I'd be having tinkeritis also!