I've just been in Blockbuster Telford where they had a pile of second hand Xbox's and PS2's for sale. Looked to be a bit of a clearance but there was at least a dozen of each. There was;
XBOX 1 for £9.99 (XBMC candidate for a tenner?)
PS2 fat for £24.99 (if you'd prefer to play your PS2 games on an original PS2)
PS2 thin for £29.99 (As for fat PS2, but a bit more awkward to put in your media cabinet due to the flip top lid)
I couldn't tell whether they were with games, controllers, boxes or anything, the units were just piled up on the floor. Still seemed like a decent deal though (had I not already got two XBOX's I would have had one!). I'm afraid there's no way of me knowing whether it's nationwide, I don't even have a Blockbuster near to home.
Sorry, don't have a pic and wouldn't want to favour either MS or Sony by using one of their logos. :)