I always buy them though I've often completed the game once I have them. I buy the authorised collection version which is bigger than brady games in the EU all round and gloriously official looking. The main reason I buy them is to draw from them as the Authorised Collections are packed with lovely official artwork but I also use them because Im not bothered to spend weeks trying to find secrets in the game or extra scenes or fights I want to play. I just want to be told where and occasionally how.