In tractors it is sort of like the car stuff.  The YUGO sold for a bargain in the early 80's (?) with lots of hype (cheap at only $4,000) was early 1960 Fiat toolings bought by Yugoslavia to start building something they thought they could sell to generate hard currency from abroad.  Marketing got lots of them out to other countries until people actually bought them and then the market sort of died.  The industrial stuff like tractors worked at later dates, but the fuel and emissions technology in the automotive world made Yugos obsolete the day they came off the assembly lines.  I am still working 30-40 year old machines, but am driving only 20 to 30 year old vehicles!!!