Help with determining how much to sell the Skidloader for.

[wc46]

I have an old John Deere 170 skid loader that I have had for about 20 years. Finally bought a newer model Bobcat. Would like to sell the John Deere but don't know what it's worth. Need some advise. It has the VG4D Wisconsin motor with 172 hours on the rebuild. Everything works but the starter is dragging and will eventually need replaced. Runs good, hydraulics are strong. Actually stronger than my new Bobcat. Tires are about 50%. I think it is a 1972 or 1976 model. I have a John Deere #7 backhoe attachment that I altered to fit the skidloader. The loader is a good old solid machine. Any ideas?