BVG & LPG (aka Legal Scam)
A great feature of some credit cards is a program that provides a lowest price guarantee, regardless of where you bought the item. One flavor of credit card that offer such a program is American Express (BVG - Best Value Guarantee). However, Amex recently put an end to the PMing of Internet retailers, presumably because they were losing too much money. Meanwhile, I discovered that Chase offers a similar program on some of their card, under the name LPG (Lowest Price Guarantee, part of the CSS, or Chase Shop Secure, program).