Thanks, Neurorad, for the response. Are there any other options to consider other than the CAM or CAV?
As for the previous owners, they claim they want the CAM so they can hook up distributed audio in their mother's home (seems like they would need KPs for that), but they cited an eBay auction at $700 and asked me to make an offer. If you ask me, they sold the home advertising he distributed audio so the should have included the components necessary to make it work. I wasnt smart enough to ask and didnt find out until i closed on the house. But, according to real estate law, if it's not bolted on, it's not part of the house. They've been cheap about a lot of things you wouldn't expect from owners of a home in this price range. Thanks for the comment about the previous owners... I thought it might have been just me...live and learn.