Please don't knock PC World etc, they are great employment opportunities for spotty schoolkids of a geekish/predatory disposition or life's great personable/greedy/unscrupulous failures who know the price (and commision) of everything but but sod all about what they are selling. In the right frame of mind it can be the most entertaining day out you will have in a while. The right frame of mind is bored rigid.
Just don't ever take them seriously.