Lucky Strike writes:

No, $700 gets one AC servo motor, one 1000 line encoder, 6m cables, and
servo driver.

Depends on what size motor you're talking about. You can do it for far
less than $700 with PMDC motors and Geckodrive controllers.

See my pages:

http://www.truetex.com/servomod.htm
http://www.truetex.com/ymount.htm