Good manners make for good negotiating. When you walk up to a table, offer a friendly greeting. Never say, “What's your best price?” Instead, try, “Would you consider less?” In general, expect 5 percent to 10 percent to be taken off the asking price, but don't push it. Dealers are there to make a profit. You may insult them if you haggle for that extra dollar off. One other tactic is to play hard to get, even if you are smitten with something. If it's evident that you're excited, the dealer will think you'll buy at any cost. It may even work in your favor to walk away; the vendor might call you back to close the deal.