I saw this a few minutes ago:
http://cgi.ebay.com/23123460fd
It's "as is" because the person claims to now have any "cords" to test it with.
There is plenty of information on this site, for both usage and repair/tweaking of BVP-4 units. (
Search forum.)
A new power adapter is easily found at Radio Shack.
If you have $47 to gamble, this may be a great buy.
Disclaimer: I am not the seller, I don't know the seller, etc etc. Just an observation worth sharing.
If you buy it, and it's broken, don't come griping at me!