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There's really no such thing as a professional car buyer, but there are 268,300 professional car salesmen in the United States, according to the Bureau of Labor Statistics. And while you may go into a dealership shopping for a new car only a half-dozen to a dozen times in your life, these guys are selling that many cars each week, so you can take it for granted that they know more than you about buying a car.

There's no doubt that most salesmen want to get you into a car that you'll be happy to own . It's in their interest to make you as comfortable as possible with the buying experience so that you'll recommend them to your friends, and then come back yourself when it's time to trade in for a new vehicle. But that doesn't mean they're not in the business for the money. It's a car salesman's job to make as much profit on each sale as he can get away with.

The car dealer has the home-field advantage, but with some preparation and savvy negotiating, you can place yourself in a much better bargaining position than the average rube off the street. Here we give you 10 tips for dealing with the savvy car salesman.

Bing: Car Buying Tips

Tip 1. Browse with no intention of buying

The first time you go to a dealership, you shouldn't be looking to buy. Tell dealers that you're just looking and don't let them talk you into anything. Better yet, drop by on a day when the dealership is closed. You can roam around the lot and inspect the window stickers with no pressure whatsoever. Take notes on what you like, then return home and do some serious research.

Tip 2. Find out what the dealer paid for vehicle

You can't know the dealer's hand in a casino, but you can in a car dealership. "Knowledge is key," says Michael Royce, a former car salesman who now runs the website Beatthecarsalesman.com. "One of the most important pieces of knowledge a car buyer needs is the invoice price (the dealer's cost) of the car he wants to buy. Fortunately, the Internet makes getting that vital info easy."

Plenty of websites can give you the invoice price of any vehicle (you can search for invoice prices at MSN Autos here), so plan to negotiate up from there, not down from the sticker price. Make sure to get the invoice price that includes all the options you want, not just the base price of the vehicle — the options have a dealer markup, too.

See: Used Sedans Under $20,000

Tip 3. Get an online price quote

In fact, get a few of them. Most dealerships have an online sales department that will get you a quote within two to three days. You can also use services such as Autobytel.com and PriceQuotes.com to cross-shop multiple dealers. You're under no obligation to pay the quoted price, and it can be a potent bargaining chip with other dealerships.

Tip 4. Get your paperwork in order

Print out the invoice price on the exact model you want with an itemized list of the options you're considering. Also, research any manufacturer incentives and rebates that apply to the car you're shopping for, and subtract those from the invoice price. If you are interested in financing, find out your credit score ahead of time; everyone is entitled to one free credit report each year from each of the three major credit reporting agencies. Also, shop a loan by researching the rates at competing banks and local credit unions. Write down all the numbers and bring all the documents to the dealership. If the dealer can't match or beat those rates, tell him you'll finance the car another way.

Tip 5. Forget about leasing

"Dealerships love to push leasing because it is so profitable for them, but leasing is almost always a bad idea," Royce says. "In a lease, you are simply renting the vehicle for a set period of time. Once that term expires, you must return the vehicle to the dealership with nothing to show for your years of payments."

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