Just been looking for a cheap Lost 1-6 complete seris, and found this at the hut. Their price is £57.95, but if you get it today, they're offering a whooping £5 discount if you use the voucher code REDHOTFIVE, and potential 2% cashback with quidco, which would end up making it just over 51 quid.
Best price I could find.
Amazon has it for £56.87
Tesco has it for over £70, so no better price at the moment. The code only works until today (30/01/2011) though.