have you looked into any deals on tesco clubcard vouchers and stuff? Other option in 'our' neck of the woods is head to the big mega-ASDA and go for whatever they have on offer - usually a cartload of something dumped randomly in the centre of the George department upstairs I have no idea why they do it like that - but the offers are usually good, really cheap.
I usually go to the 'graded goods' outlet round here, a few cosmetic minor bumps and chips on the stuff but nothing that wouldn't get done within a fortnight in our house with three dc anyway. good luck.
(ps MODJAMH what [ish] area are you in, vague as you like if at all)