I feel like that is the right price range. You might be able to get it for a little bit less? I would expect the frame to be perfect and the suspension recently serviced. You might want to make an offer. I know when I would be selling a Yeti in the past is because I purchased or ordered a new model and really wanted to reduce my stable. A couple hundred would give you some extra $$, in case you have issues with cassette wear etc. I also saw some limited sized selling brand new for less than $4k a couple months ago. They didn't have carbon wheels but were decent builds. If you are looking to replace the 100, I would look at a 4.5. It seems to pedal closer to the 100 and rocks downhill. I actually wish they had something like this now. If you can afford two bikes, the 100 and 5.5 are a great combo. Ride the 100 when you know you have a bunch of climbing and ride the 5.5 when you don't.