This is my first deal post so hope I do it right :)
Using the Discount code posted by the lovely lilmissmup for £10 off a £30 grocery shop you can get the complete season 3 of Lost for a bargain £31.97 and then of course postage costs but these vary. Just do a search for the DVD and you will see there is a whole range availble on grocery and games too.
there was a typo in there and i can't edit it damn sorry!
"Mabccc" - Only some tesco stores do DVDs as part of groceries. - Thanks for pointing this out I didn't know :/