I didn't want to post this online because I don't like people who trash other people's classifieds, but that system you have for sale was made back around 2003 - 2004 and it sold for around $145 new in the box. I understand you never unboxed or set the system up but down here there is more harm done to new electronics that aren't being used than ones that are used every day. The humidity will tear up electronic components.
I would be interested in the outfit but not for $50 or more over MSRP and not after sitting around for 7 years or more not being used.
Just thought I'd give you a heads-up on the situation as I see it.
Good luck with your sale. I hope you don't end up with a dis-satisfied buyer.