$1550
i was deciding if i should sell my penryn blackbook aswell since the new ones are coming out soon and didnt feel like taking it on vacation, but I did put an ad on craigslist and got 5 offers all accepting the 1550 price. This of course included all my accessories, so moshi palmguard, incase hardshell, a sleeve, and the dvi connector, oh and 3 gigs of ram. 😎
I guess it wasnt needed to sell everything i owned since i would be buying another macbook anyway. But i would say 1500 just for the macbook is a good price, if it's in MINT condition.