I am a huge Fan of Craig's... I have been using it for many years to great success
The only thing is there are no guarantees, ... (lol see below)
Yuo are dealing with people and honesty
and some try to get more $$ than their junk is worth
I have found .....
MY new Bike, and one or two previous ones...
My Current Roomate
My Ex-Girlfriend (see above) (kidding she's a very nice girl)
My Couch, washing machine...
My current Computer (a great deal 1.5yrs ago)
My digital Camera...
Umm that's all I can think of for now, but there's probably more...

It's a great site, I find the class of people who buy/sell on it are a good reasonably honest bunch