Just for the commiseration: Today I submitted an offer request from caroffer.com. They crunched the numbers and offered me... 600 bucks for my 2001 Saturn SL2. Blue book is 4800. So I guess their formula is (Blue Book - 84.5%) = CarOffer.com!!
I'm going to aggressively drop my asking price on craigslist. Hopefully you and I can do better than 600 bucks!