Not a real experianced guy with them, but we just got a used Japax never seen one before last week. Huge amount of work to clean it all the filters were blown out and the thing looked like it had never seen any maintance in its long life. Something to look at when buying a used any kind of machine.
Do all the manuals come with it or are they missing. Its a big pluss if they do come with it. I have been able to in a week get it cutting, it took alot of reading and time to sit at it and work through all the settings but hey thats what i get paid for.
As far as is the one your looking at a good machine hey cant say, we got ours at a auction and could at least see it up close and personal so we knew what we were getting into.
Good luck!
Just another chip in the pile.
aaron