Prince P200
This machine is very heavy. I recently purchased this machine for under 200 dollars. My tennis friend who I purchased from helped my carry it out to my car and all the following day my back hurt. When I got home I had to get machine out of my car by myself, my wrist was then very sore. I know when this machine was being sold by authorized dealer many years ago it was shipped in 4 boxes due to its weight.
Like Irvin said parts are hard to find, not even 'Tennis machines' carries parts for this machine. But if compressor goes out in it you could purchase a pancake compressor.
-shawn