Just bought the Star Trek the Next Generation BR box set for $54.20 shipped.
The Alien Anthology blu Ray box set for $19.85.
The Walk BR, disneys Beauty and the Beast BR, The Blu Ray 5 movie starter pack with Ouija, Mama, Purge, Purge Anarchy and As Above So Below, Jurassic Park Trilogy Br set, the Indiana Jones Complete Adventures BR set and the Back to the Future BR set all for $75.13 shipped!
Average is around half off the same items on Amazon here in the US!
I will now check all my DVD and BR purchases with Amazon UK first. Yes, it takes longer to get to you, but I can wait to save 50% on average.
BTW, it does seem that ALL blu rays in the UK are region free.