Anyone who has quibbled over prices with a vendor knows you get the best offer when you pretend you're not interested after all. The technique of walking away can work online too: Some sites contact would-be customers after they put items in their shopping carts but don't follow through with a purchase, offering discounts and other incentives via email. This recent Time article
lists stores that have done this; just remember you have to get far enough into the checkout process to log in or enter your email address for it to work. Recent example: We put a $120 North Face jacket from O2GearShop.com in our cart, left and got an email with the subject line "Forget something?" a few days later offering us 20 percent ($24) off.