It was a bargain (with respect to the probable selling price on eBay). I also know the price of the new CDTVs was based on how much Cindy got for the CDTV-CR, so there's a hint. ;-) I think all the prototype kit went for a song, really.
You are VERY lucky to get a CDTV-CR. Did you ask Carl how many were made? I think less than 10. If you can post some photos of it that would be great.
Did Carl tell you anything else about the CDTV-CR? Why didn't C= release it? I think it was basically done.