Alright, I've had enough of this so I'll finally take a bit of time to show you fully why this user IS indeed a scammer.

First of all, I'll introduce myself.
Some of you might not like HackForums but this is me: http://hackforums.net/member.php?action=profile&uid=1798735

Now, I'm a very trusted and reputable trader there and basically what I do is resell giftcards.
When I saw librty selling a Xbox 13 Month Code for $20 I thought it was a great deal because people usually pay a bit more for these on HackForums so I thought I'd resell it.

His PM's on bitcointalk.org. I required proof and he sent me this:

http://imgur.com/wOq4XMY

Now, I've had deals with xbox before and I thought that once I entered the code if I got this as a result:

http://imgur.com/wOq4XMY - this would mean the code was fully working (I eventually found out later it does not).

I sent him my Skype and he added me.

I asked for proof of date and time because it could be an old screenshot.

He sent me that actually did prove it. - http://imgur.com/QEjjg7C

I then asked for his BTC addy and told him I was from HackForums - http://imgur.com/aMfSvI1

He then sent me the code - http://imgur.com/xIywlfo

I told him the code DID work because I achieved the same screen as him on XBox. I'll show you:

Redeeming his code - http://imgur.com/9h9EcH1

All great so far - http://imgur.com/GnoloZH

Oooops, doesn't work - http://imgur.com/W9Akdoq

I also tried it on xbox - http://imgur.com/uK93UDZ

I then tried contacting him but he never replied again - http://imgur.com/AfmcbIR

Thank you for reading.