hmmm..
Tell you what. I wont play arround coz keeping in mind that the spoiler is Aluminum. which means its light weight and wont Spoil the performance or the boot lid, but will only spoil the AIR and is brand new/unused which also means its assault-less!
5K would be final and serious from my side. (Y)
PS-
Putting your self into my shoes, Cash would be the only option
plus i have also got a brand new EDEL BROCK (AMERICAN DRAGSTER's) WET INJECTED NITROUS KITT SEALED PACK. LET ME KNOW ABOUT IT ONCE YOU HAVE DECIDED ABOUT THE SPOILER. TAKE CARE MATE