The article actually covers that: Virtually every single one of the large sites does it: "Think switching pricing on your users is is unfair or clumsy? The bi

The article actually covers that: Virtually every single one of the large sites does it: "Think switching pricing on your users is is unfair or clumsy? The biggest ecommerce sites in the world have been doing it since the turn of the millennium!" Links to: http://www.wired.com/techbiz/media/news/2000/09/38622 http://www.wired.com/techbiz/media/news/2000/09/38622 If you have a lot of returning customers offer a price-drop gaurantee or similar.