They are a china made tractor the same as the tractors you can buy through Northern Tool. I think the forum in the link below would be more suited to answer your questions.

Here is a link that might be useful: compact tractors

Also go to the link below. They have a separate forum on Jinma tractors. There used to be fastener issues that I've read about (bolts that break, etc.) and owners would change them out for higher strength equivalents. But that was a couple years ago and they may have improved that since then. The Chinese tend to listen to owners opinions and make the necessary changes, from what I've seen.

Here is a link that might be useful: Chinese tractor Forum

Hi, as far as i know Jinma tractors aren't popular in US. None of my colleagues have it. It's not popular, becouse we have no dealers of that brand in US. The only way of purchasing this tractor is to import it from China, or from Europe - used machines. I don't know how it is with importing tractors from China, but i was once importing parts for my JD from Europe. Below i'm giving link to Jinma tractors available currently to buy in Europe.

Here is a link that might be useful: Jinma Tractors