Coupla years ago, I bid and won a K&B Torpedo Green Head .23, it was just beautiful. No box, was glad to get it for $45. When it got here, I opened it and quickly deduced it had a painted head...(good job, but painted!) Turning it over, I snapped that it had a lot of play in the con rod! Off with the backplate, and that rod big end had so much play...It went into Overtime!
The crank mic'd egg-shaped, .002"!!!
I cried the blues on the SSw site, and no less than THREE wonderful guys volunteered parts, would accept no money. (even when they found out it was for a B Team Racer!)
The seller had taken the 5th, Ebay wanted it 'settled between parties'...I had my .23 the hard way, a good runner, after I coated it with Castor...
Generally, I have had good luck.