My Usage Of Amazon.co.uk

I recieved another large order of books yeasterday, but something I rearlised today was that I buy books from Amazon without questioning wither I am getting a bargain or not. I just assume that the price I pay will be the cheapest I could get them for. Then I wondered wither I should question the ammount I spend there, but then I rearlised that last time I chacked the price of a book on amazon against a shop (my universitiy's book shop) Amazon was £5 cheaper.

Random Accompanying Fact
I am currently reading English Grammer For Dummies.