Well, amazingly my friend got a full set of DS one sheets for £100 plus another DS one sheet and two DS quads for £5.99 each!
All on Ebay UK. I never even seen them but he contacted me today to tell me and boast a little.
Still doesn't beat my record buy of all four one sheets, four quads and a Dark Knight Rises Advance for £50.
It's still pretty 'effing close though.