those fx engines are pretty tolorant. OS has fixed the peeling problem. i keep hearing guys telling other people that "it might be a peeling liner" but i have never heard of a recent case of this. those FX engines really carry the OS reputation for lasting forever, so as long as the engine has not been abused, it should be a great little engine.
in regards ot the price, becuase of the genuine lack of trust due to the fact that nobody has ever heard of anyone else on ebay, and there are a lot more jerks and braindead buyers/sellers on ebay than there are on rcu brings the ebay price for the same item a bit lower than on rcu. engines on ebay, in my experiance, only sell for about half their original price when used, so $64 is actually about right for a $130 motor.