I think I got a copy of the Flex 940 manual somewhere around here. I was about to suggest how to fix the wobble on the 940 but Adles seems to have fixed it on his own.
$250 is about the average price for the machine. That was close to what I paid for mines. There was one selling for $300 near me, recently.
Machines: Gamma 6004 2-point w/ Wise 2086 & Babolat Sensor Dual