The best and most reliable vehicle valuation that we at Serwe Automotive uses is Kelly Blue Book (www.kbb.com) or NADA (www.nada.com) 
Both have been in use for decades and are great resources for an shopper. With these tools you can make sure to pay a fair price for your next vehicle and get a great trade in value. Visit www.kbb.com or www.nada.com to start your research today!