Just used this, thanks. Best deal i've seen for a 320GB by far. In case people are dubious of paypal redemption codes, like i was, this is a kosher ebay promotion for this particular item, and can be found for yourself here.
That page also states that the codes are valid until November 30th.
alijem on HUKD contacted Sony regarding warranty and was told
"when i spoke to the sony customer support they said becouse it was bought from ebay they class it as second hand even though it was bought as new, they said the only way they would provide a warranty with this product is if it has a proper zavvi receipt, paypal or ebay receipt is not accetable"