Argos

Quite a small shop, but doesn't need to be much bigger.
With Argos, you look the items up in the catalogue and then order and pay at one counter, then pick up at another. Quite a simple process. It can be a nightmare if it's a busy time though (like Christmas!) 

They could do with some more catalogue stations though, as it can be frustrating if you have to wait around to use them. 

They now have machines where you can order and pay for your items using your card. This means you don't have to queue up. Although you still do if you want to pay by cash.

Argos prices are ok, but I feel they usually can be beaten by other online retailers now.