While Amazon offers you a lot of DVDs for less than that price, it also offers you a substantial amount of rentals via Instant Video at well above that price.<p>I&#x27;m going to assume - not least because we&#x27;ve paid for those rentals more than once - that they have a good idea about how to set the prices.<p>Movies that are interchangeable light entertainment will go cheap. Movies people seek out or decide they really want will cost more.