Costco members only tv deals are there much savings? As some you have to be a member to see
Any members know the price for Sony KD65XH9005BU 65 Inch 4K Ultra HD Smart Android TV
I did read somewhere and could be wrong, that to take advantage of the online deals you have to buy the £15 online membership, but to keep the 5yr warranty you have to maintain that membership.
It's not a huge amount of cash, but if you won't use Costco for anything else then take that into account.