I just went in to my local Blockbuster to confirm their sale prices as per what other members have posted and found this much sort after gadget!
It was labeled as £17.99 but scanned at £7.99. The girl at the till confirmed the price drop and that it was across all UK stores as of today.
Pre-Owned only so ring your local stores to confirm stock levels.
Don't forget the 360 and PS3 games going between £4.99 and £12.99 while your there!
This is the first deal I have posted, only posted because so many people are looking for this drive. Best of luck to everyone hunting for one, hope this helps!