All too often, private used car sellers assume that they know the price of their vehicle in the current market. That assumption is a dangerous thing to make, as it often leads to an undervalued vehicle that will get the seller less money than they actually deserve, given the condition and year of their used car. In other cases, assuming the value of a vehicle without first checking its value online can mean offering a car at an overpriced level. That certainly won't attract any buyers to the classified ad, and a high price can make it much harder to close any sale. At the very least, sellers will be faced with tough questions and negotiation from their prospective buyers.