At the Sainsburys in Arnold, Nott'm there were some good DVD deals such as seasons of 24 for £15.
But the best I saw was season one of the American show Shark for £10
The next cheapest online is £23.79 from Borders so its a great saving.
It was available instore in Nottingham, but I've heard that the 24 deals are nationwide so I'm assuming this should be too if its in stock in store.
I thought it was a bargain anyway and worth a try for just a tenner!