ok Thanks Joe, will take it in.... huge Pita, put suitcase and lose 1/2 day but..... it is still worth used $600 (per ebay) so probably worth saving?
You could not sell it in good faith as is.. anyway?
You could sell it "as is," but that may decrease its value substantially depending on precisely which component's faulty.
You'll won't have a realistic idea of what to do until you know what it'll cost you to get the iMac up and running.