I saw these in Tesco in Macclesfied - the big one. On the box they were in it stated they were £2, but on the shelf were showing at 30p. They scanned at 30p.
Brilliant for all sorts of uses - they work very well as polishing cloths.
This got very hot when they were £1 so looks like a cracking deal. See here - http://www.hotukdeals.com/deals/microfibre-cloths-5-pack-1-tesco-instore-904789
Instore only - can't find them online.
Will post a pic in a minute but imageshack is auto rotating the image for some reason - so apologies if you get a bad neck!!