Sounds like a great deal!
The 10EE would have originally had a motor/generator (MG) drive with a DC spindle. They were very robust and had incredible variable speed control, lots of low end torque, down to about 8 RPM. If it has the original drive, don't let anyone talk you into "upgrading" it to an AC motor with a VFD controller; you can't beat the original DC drive. I know all about that drive and can help you with any problems.
Cal