Recently, they have been raising prices, not lowering them. Just off the top of my head; After Earth, The Great Gatsby and Man of Steel have increased in price since they were listed. In addition; The Fifth Element, JFK, Pacific Rim and The World's End have all 'sold out' which I think we can all agree is total rubbish. They used the same tactics with The Great Escape, Skyfall and Willow which were all available cheaply until they sold out. Then magically hundreds more copies appeared but at a conveniently higher price, Willow is still in stock now!
I find it strange that Amazon seem to be immune from criticism when they have been getting increasingly expensive in the last few months. Zavvi are starting to beat them on price and Sainsbury's nearly always do. Entertainment Store and Zavvi get criticised on a regular for even the silliest things, yet Amazon do what they want and no-one says a word.