The article below provides a fantastic analysis of issues in the valuation methodology of vehicles. However, given the current (and unprecedented) automobile market, the information provided is effectively moot. True, Kelley Blue Book (KBB) and other valuation websites were the gold standard for settling disputes over vehicles in divorces. Many attorneys may recall printing out Blue Book or other data providers and bringing them to mediation or to a hearing to justify the requested vehicle value.
Now, individuals cannot rely on KBB and other similar online valuation data providers, as it may significantly underestimate the value of the car in the current market. With the bizarre influx in the resale value of used cars, that old 2003 minivan sitting in the car park is not worth $2,500 KBB predicted but may sell for as much as $10,000. This has created an avenue for legitimate arguments over the value of the equity in a car during a divorce proceeding.
Of course, this market, like the real estate market, is not going to be permanent and we can expect to return to relying on KBB or other car valuation data providers. But for now, it is advisable for individuals and attorneys to rely on the market price and the best way to determine that value may be to sell the asset, as it is likely worth exactly how much someone would pay for it. Experts, like Brian Sinuk, who contributed to the original article, are still important as they can fill in the gap between the stale reliance on published data and the current market.
 Uri Daduch, In Search of the Global Middle Class: A New Index, Carnegie Endowment for International Peace (2012).