I'm not that knowledgeable on the prototype. I just love the production game ! There's a very cool site which validates the auction ;
http://www.hassellcastle.com/cvsample.htmBest of luck to the seller, and I think the buyer would be very happy to have a proto.
As for the pricetag - $7500 for a shopped CV with new (non Next Gen( decals was the going rate 5 years ago. So a sample game in collector's quality may be worth $8000. I consider CV to be the best DMD ever made, so maybe it is worth the $ ?