Did they say these were Vietnam rebuilds? Doesn't sound quite right. As I understand it, they make them look good and charge a lot of money for them. Actually, I think the correct word, as used by Vina Tractors is "reconditioned", with some assemblies "rebuilt" as needed. Reconditioning means disassemble, clean, inspect, replace parts if needed, lube, reassemble and test, good to go. I retired from a "National"ly known Cash Register Co. And reconditioned 100's of cash registers like that, as opposed to "factory rebuilt" which is being claimed by some retailers. We also had "factory rebuilts" that actually went back through the factory assembly lines for 40-60% parts replacement, and restored to like new condition.