For anyone looking to find accurate and up to date information on vehicles, be it potential car buyers or dealers, Kelly Blue Book provides all the relevant data on car models, features and selling prices. It's an online service with an extensive database of car value data and vehicle information that is based on trusted and official information. The Kelly Blue Book InfoDriver API makes this data available to be integrated with other websites and applications.
Microsoft is one of the first--and certainly the largest of--customers of Wolfram Alpha's commercial API (our Wolfram|Alpha API profile). For math and nutritional searches, Microsoft's Bing now uses Wolfram results.