As you are aware GameStation are currently selling Fallout New Vegas on Xbox 360 for £19.99 (Instore & Online). So you purchase this.
Then at Argos they give £32 trade in (so a voucher with £32 quid on it)
Argos are selling god of war 3 and heavy rain at price of £14.99 (brand new and sealed). You can reserve them or just go to the store to pick them up. Advantage is you can check stock online, so there is no run around.
So with the voucher you purchase the above two games.
Making each game £10 quid if you like.
So really good bargin for two massive titles on the PS3. Also for your trouble you are left with a nice £2 quid on your argos voucher.
Was thinking of doing this, but I would have no time to play games at the moment, so hope you guys can enjoy this idea.