Value of a RA Moog 351 Theremin?

Anyone know what these sell for? Obviously its not something you see everyday so there probably is not a "going rate".

I couldn't find any on eBay. I suppose it depends on the condition. Do you have one for sale?

Folks, here's a link to our Moog 351 in the Theremin Gallery for reference:

http://www.thereminworld.com/theremins.asp?m=1&t=8

yes.. I will be selling one in pretty good shape. It's all original (no mods) and working perfect. I know it's very rare, but was just curious of what it might be worth.