It can be a bit of a jumble sale, and sometimes its a bit pants....but I find a lot of really nice cheap shoes in there. Got some hugely comfy silver ballet flats for £5, and some ankle strap brown peeptoe wedges for £6 last week.
French knickers for £2 each, gel padded bras for £5
I get a lot of work clothes from there, combats and long tshirts and vests, even if they only last you a couple of months its no biggie because they're so cheap and cheerful.