Just an FYI... it's $265 with free shipping from Revzilla. By the time you add in shipping charges (unless you can sell it locally), you're pretty close to brand new prices.
He didn't say which slip on! If it is the stainless GP, you are right, its a silly price b/c you can just buy new. If it is the Carbon slip-on, however, that is a solid discount.No kidding. Silly. :|