Did you not read the chatter between PW and myself. For the most part they are now giveaway engines. Do you even know the model you have?? PW will take it off your hands, I would pay shipping costs. Not a lot of improvement but it's something. I just sent a buddy an engine today, he is paying shipping, that was 9 bucks. I still need a 110 parts engine.
If you post in the YS forum there may be someone there that would want a nice 120. As scale said, great engines, all of mine still run very well but I was taught how to tune and rebuild them.
I had my own instructor though, Richard wouldn't come to where I was living to teach me how to twist the needles.