I bought a used rc10gt off ebay one time. The guy said he'd seen the engine run. When I got it the engine had two of the head bolt holes stripped out and had a tap broken off it one of the back plate holes. I got it running but I had to buy a new block for it. Couldn't see any of that in the pics in the add. Cured me of buying used motors on ebay. Don't expect an ebay motor to run. That's what I've learned. Only took once.