Intersting Catalog
I just got an interesting catalog in the mail yesterday from The Surplus Center. I haven't bought anything from them in awhile, but they do have all kinds of intersting stuff from motors to hydraulic cylinders/drives to pulleys/sprockets. You'll love it, especially if you are a tinkerer. They had a Hydrogear 2200 EZT transaxle set for $599 for both sides. I don't know if that is a good price or not and I have no affiliation with them at all. I do like thumbing through their printed catalog. Check out the link below.
Bruce
Surplus Center
This is one of the threads, look in this catalog some good seat prices which I don't think you will find a good used one for a better price