Went into my local Woolworths tonight (Cheetham Hill, opposite the Manchester Fort) with the intention of buying a HDMI cable, which I knew to be £15 quid or so as I'd bought one the other day.
I ended up walking away with a HDMI to DVI cable for £1 !
I want it to connect a graphics card to a TV, so it's perfect (the HDMI cable would have worked too as I have an adaptor, but this was a lot cheaper).
I also picked up a DVI to DVI cable for £1 too.
Not sure if it is just this store or others.