C-westin body kit anyone?

I have a C-westin body kit for s13, and I have a friend wanting to buy it but I really don't know what it's worth I have found 2 websites that sell it and he's trying to convince me it's a knock off of c-west but I don't know the places I looked the C-westin shit was as expensive or more then c-west I'm just curious how much the kit is worth though if someone could tell me. Also maybe send me any links that have the body kit so I can convince him it's worth something I personally think used I can sell it for about $800ish but maybe the sites I'm going to are expensive, don't know......

http://www.takakaira.com/aerokits/aerokitindex.asp?sideon=sidemenu.asp?cat=4
use that and go to c west on the side scroll bar...they have there body kit on there for the rps13