Argos, the store.

This store similar to Target from what I can gather, except for one
major difference. If you notice, it has basically no products on
display. The deal is, you look through the cataloges, punch the
numbers into a stock checker and take those numbers to a kiosk to pay.
Then about 5 min later they call your number like a fast food joint,
your numbers appear on a tv like you've won at kino, and you come pick
up your goods. So strange.
I bought some color-coordinated sheets that actually clashed, so had
to immediately get in the return line to exchange for a different
color. From what I gather, that is the one big fault with the can't-
see-before-you-buy system. But I suppose it is understandable in cramped little London.