i know there is no way to prove that the code has not been used. frankly the reason the code was scratched off is because i wasn't sure if WoW still used the same length keys. so i had to scratch it off to see if the lengths matched.
i am open to suggestion of how someone would like to conduct payment for this item given the condition. like i said i found this while moving. i half expected this kind of response when i made the thread. i am also not an idiot and i know that people aren't going to trust me based on my word alone. I live in canada and would be okay with any interested party giving me a skype call (or phone call, but international rates are sometimes murder.) while we make the trade if that is alright. if for some odd reason the key does not work. i am more than happy to refund any bitcoins by sending them back to you, provided i have screen shot of you trying the key and it getting rejected.
i am not looking to scam anyone (i know that this sounds dumb but its true.) im just a nice guy trying to help, out others with game time for a little BTC.