I have been waiting for Amazon UK to put The 'Burbs with Tom Hanks directed by Joe Dante on sale for months. It's currently at GBP$20-26 on Amazon.
The special features for this classic are unique to the UK edition including a remastered transfer, commentary and documentaries and is Region B. Far superior to the local edition.
Then I found that the actual distributor has a sale on some blurays. When you look in the menu it's not showing the sale price, but when you click into the page it had 50% off!!!
They seem to specialise in cult classics, so check it out. Old Romero, Vincent Price etc too.
Postage was GBP$3.50 and it arrived in a week. Very happy.
I've been waiting for the steelbook to go on sale but if its cheap enough I may go for the standard version instead. The post doesn't actually state what the price is.