in addition to a number of (subjective) bargains in their stores (inc. xmen £9.99 and galaxy quest £7.99), woollies have put a number of sub £10 disks on their website. the standout among these is the HKL iron monkey disk for £8.99 - allegedly a very good film if you`re into the hong kong swordplay stuff.
http://www.woolworths.co.uk/shop/category.jhtml?CATID=3400