Courtesy of YNN/ Time Warner Aired: 11/29/2011 If you decide to solicit an expert’s advice to buy your next car, you still need to choose the right service. Lauren Fix, the Car Coach, has more. If you find the car-buying process intimidating or are just too busy, you might want to consider using a car-buying service or concierge. Car-buying services work either by charging you a flat fee or claiming a percentage of what they save you on the purchase price of a car. These services will help you choose a vehicle, negotiate the best price, get trade-in values, review the purchase contract, and arrange to have the vehicle delivered to your home or office once the contract is signed. While car concierge services charge an upfront fee, they promise to negotiate a low price that yields net savings for the buyer. There are many services offered by insurance companies, banks, buying clubs and independent companies. Here are just a few: AutoNation Direct taps into its 200 AutoNation outlets across the country. A car-buying consultant advises you what new or used car to buy, locates the car, and arranges test-drives, pricing, and trade-ins. USAA offers a service called Auto Circle with up-front member prices on new and used cars from USAA certified dealers. AAA Car Buying Service helps you find your perfect vehicle with exclusive access to great deals. AutoFinder.com offers pre-negotiated Dealer Pricing for all new vehicles. Carsala.com assists you in buying used cars at new-car …