well i have bougth three used motors in my time from guys i didnt know but all were from ebay and sellers had to have 150 or more positive feedbacks. reason is the last motor i bought was also a old p5x description was motor in good shape with a ton of pinch left. i got it and it was able to turn over by hand without a flywheel which on the old novas means its done so told the guy he would send me either full refund or half the purchase cost or would get bad feedback so he sent me the money also if use paypal they will protect you from these things also all the same would like to buy new only or used from friends but sometimes when you are broke you try to get out cheap worked out for me put piston in another sleeve and worked great