Looked in Game for games (surprising!) yesterday, I've been trying to find Portal 2 for Xbox for the past two months or so because I refuse to believe that the £20 Marketplace one is the best value.

I found it in Game yesterday. Pre owned. For £25.
They also had Tomb Raider on sale for the same amount.

How can you justify selling a two year old pre owned game for the same amount as a brand new new one someone please give me these reasons