These aren't bad if you want just a cheap kit that will do most jobs
http://www.ebay.co.uk/itm/94PC-1-2-1-4-SOCKET-SET-SCREWDRIVER-BITS-/190370490392?pt=UK_Hand_Tools_Equipment&hash=item2c52f72818
My mate's just used this kit to replace his head gasket on his v6 vectra, so a pretty strong kit for such a cheap price
I paid £40, but the ebay auction is at £29.99 buy it now limited time only