$500 seems like a good price to me for a Quality unit!!! Kenwood builds good stuff. I have a single-din Kenwood flip out unit in my truck and I love it!!!
If anyone is looking for a DD unit, this is a good one at a good price!!!
Also, I believe you can add the Kenwood IPod adaptor to control your Ipod with this unit!
I had a 7015...the first version of this one. It was a great head unit and was about 3 times what Gary is asking when I bought it new.
Kenwood has an iPod interface for a few bucks that'll let you control the iPod from the head unit and charge the iPod also....you yes, you can hook one up to it.
7017 is a great unit. I have the next model down (DDX-6019) with the nav and love it.
I think you're asking a fair price.....just be patient if you don't get replies as quickly as you hoped. Eveyone is broke these days and you've only had it listed in this thread for just over a week. Post it up on craigslist too and I bet you'll sell this before the end of the month.