I just ran across an interesting WSJ article on Staples varying it's online price based upon your location and proximity to a regular store or competition. Lowes and Home Depot were also found to vary their online pricing. The story went further to find that Orbitz would offer discounts up to 50% if you were using an iPhone or Android phone to check pricing. Obviously, this is possible with the geolocation information provided by many ISPs, but I always considered internet pricing to be absolute.
http://online.wsj.com/article/SB10001424127887323777204578189391813881534.html
http://online.wsj.com/article/SB10001424127887323777204578189391813881534.html
