I just scored this one off CraigsList for $600. One of the cylinders needs oil. Not sure if it's toast. The other one seems to work but the chrome is rusty on both of them. Worst case they're $55 at harbor freight. Also some of the casters have bad bearings and it's missing the square tubing that connects the two ends together.
I was thinking about modifying this one to include the threaded rod to adjust the center of gravity. Anyone think that's worth the trouble?
Also, I'd be curious to see what other's have done for mounting brackets for an early A body. This one has extra square tubing and brackets welded on. Not sure what they fit.