Deff worth getting GameStation to price match if possible. Went to my local and they offered me £11.50 for GT5 (£9) and EyePet (£3.50), an insult! Got them to price match CEX round the corner (GT5 £16, EyePet £4) plus £1/game they weren't cheaper on.
In the end got £22 for my trade ins (double their original offer)
It really does pay to check around and get these places to Price Match!