I went to the new Bristol branch (Cribbs Causeway) of Best Buytoday to see if they had any offers on the games as I bought the Mario Kart/Sports Wii boxset their at the end of April when they first opened and discovered that they have now knocked another £10 off what I thought was already a good price, making it now just £129. They also have it for the same price I paid at the end of April but also with Lego Pirates of the Caribbean, making it £139.
I got them to price match themselves, and they were so flustered they gave me both the free game and the £10! LOL
I can't remember when it said the offers expired, but I think it was early June.