He said he sold it on Ebay about a month ago, sorry. But he said there are many of those interfaces on Ebay, brand new ones going for between $40 and $50.
http://www.amazon.com/Pioneer-CD-IB100-vehicle-interface/dp/B0007YPOAA $45 If the price is the same, I'd go with Amazon It seems like most people though don't really like using it though. A saw quite a few low ratings about that unit.
Ranger, thanks for asking either way. Klink thanks alot for the link, ill be ordering that soon. The only low ratings i could find about it where regarding the difficulty people had searching through songs. With my 7800mp it should be a breeze.