Good price on zotac 1070, cheapest of this type around. Although says highlighted "**The Seals have been opened on the unit for display Purposes, Item as NEW**". Shouldn't stop anyone buying, still has warranty and will have no signs of use.
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275 is ex vat price
£275 + VAT = £329.99 which is what the OP stated.
Which is weird because most of their other products are listed inclusive of vat.