Rumor: Retail sources detail how pre-owned sales will work on Xbox One

[jlrx]

You can't run a business on 10%

However that is why GameStop came out and said 70% of their profits come from new games (possible also hardware).

What do you think their profit margin is on a new game?

I've no idea to be honest, with so many hands in that pot, it can't be too excessive.