Call of Duty: Modern Warfare 2, PS3 – £25
Gamestation are offering Modern Warfare 2 for £5 when you trade in 2 games from a list. Included in that list is Overlord 2, which can be had for £10 here. If you buy two copies of Overlord 2, you will be able to get MW2 for £25 total.
If you have any concerns about doing this, you can always return the two games to Play for a full refund if you are unable to do it.
what're you buying, stranger?