How Retailers Use Personalized Prices
At some point in the next 5 years, I predict there will online services that will "proxy-shop" for you. They will specialize in building profiles (cookies, logins, etc) that get offered low prices, then use these to purchase products on your behalf. Perhaps a browser plugin, so that at the moment you go to check out on a product, you send the product's link to the service and they get it for you at a lower price.Then retailers will attempt to bring legal challenges against them for breaking terms of service, that will be interesting...