Derek,
Assuming your scope is complete and useable, take a look at this older thread from a deceased estate. I don't know what the lots actually sold for but a couple of 3" unitrons in fair condition were north of the $1k mark. FWIW of the gear had seen a LOT of wear and tear (the images are gone now).
http://www.iceinspace.com.au/forum/s....php?p=1374174
One of the blue mountains chaps brought a classic Vixen 60mm f/15 to one of the club nights a few months ago, and it was a very salient reminder of how good an achromatic refractor could be, when done right. Absolutely perfect image.