Ok went into Game today and asked to trade in Red Dead Redemption on the xbox 360. Was told that credit = £20 but asked how much cash was...they said it was also £20.
This is VERY unusual and must be some sort of mistake, never the less they let me trade it in for cash. I can upload the receipt if necessary, but it means a profit can be had if bought second hand for £14.99 at certain gaming stores!
Hope this helps some people!