Per the "Oktoberfest" sale on DVD and Blu-Ray, there are a ton of TV and Blu-Ray deals to be had.
Example: Harry Potter 1-6 BD $42+shipping or less after VAT removal (USA doesn't pay VAT).
Most Blu-Rays are not locked, and can be played on any player. Check the blurayregioncodes site to verify compatibility.
If your player can also display PAL/multi-region DVD's, you can clean up with some of these deals.
To access the Octoberfest sale, visit Amazon UK> DVD & Blu-Ray and look for "Oktober Fest 75% off" link on the bottom right list of current deals.