Report it to M$ and wait a week to let him know it has been reported.So I should report the Kijiji ad or just let the seller know that they might be doing something illegal?
It is illegal to sell just the COA without the genuine installation media, so this sounds a bit dodgy.
Very cheap, too. Also a slightly worrying sign.
Providing you have a valid key, you can download an iso from here.
http://www.w7forums.com/threads/official-windows-7-sp1-iso-image-downloads.12325/