If you are in the market for a frame machine you are probably asking if you should buy a new one or look for a used one.
A used frame machine can be a good alternative to purchasing a new frame rack if the unit is in proper working order. Most machines will need some repairs or replacement of hydraulics and chains which can cost thousands of dollars. Additionally, transportation costs of the frame straightener can be very costly depending on the distance the machine will need to be moved.
Purchasing a new frame machine could save your auto body collision shop money on future repairs as well mitigate any risk of problems with a used machine. Also, a new machine will come with warranties and support.