Hey Shopbot community, can I get your help?

Dropbox link to pics: https://www.dropbox.com/sh/lpnwl8mo5...fHa3XsBTa?dl=0

I have owned this 1999 Shopbot PR 48x96 for around 7 years. This machine has been great. Not the fastest machine around, but it always gets the job done. This this is a testiment to how good a machine Shopbots are. 20 years old and still cutting!

Earlier this year I found late 2000's PRT and upgraded. I have kept the older PR around, but I need the garage space back.

Anyway, I have no idea how to price this machine to sell it.
Here are the facts:

4x8 Rack and Pinion
Welded Steel frame (very serious)
Upgraded 4G controller running 3.4.6
Uninstalled Z-axis upgrade with motor
Cable guides
Limit switches
Z-Zero Plate
Steel computer cart
Windows 7 computer
2 router motors

I'd appreciate any advice you can give me.