smooth wombat writes "Have you ever been shopping online and noticed the difference in prices for the same item at different stores? Do you realize that not only are the prices different from store to store but they could be different for you compared to someone else who shops at the same store? Nearly 2/3 of adult internet shoppers thought that practice was illegal according to a study (pdf format) conducted by the Annenberg Public Policy Center of the University of Pennsylvania. First-time buyers at a retailer could see higher prices than a firm's repeat customers, and retailers may not offer discounts to consumers who buy the same brands regularly without even looking at alternative products on the same site. From the article: 'The Annenberg study was based on results from a telephone survey from Feb. 8 to March 14 of 1,500 adults who said they had used the Internet within the past 30 days. The margin of sampling error was reported to be plus or minus 2.51 percentage points.'"