Late-model used-car prices sank $115 to $21,643 in December. This is the lowest prices have been all year; they're down 6.9 percent ($1,594) since the beginning of the year.
Fiat 500c prices dropped the most this month. The subcompact car was down 4.6 percent ($741) to $15,495. The Ford Ranger pickup truck and Dodge Grand Caravan minivan followed it, with declines of 3.4 percent ($600) and 3 percent ($516), respectively.
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Prices for used luxury cars, particularly those from Mercedes-Benz, continue to strengthen. For the second month in a row, the Mercedes S-Class flagship sedan had the biggest price increase. It was up 2.1 percent ($1,200) to $59,145. The Mercedes M-Class SUV came next, with its price up 1.9 percent ($708). Following it was the Toyota Sequoia SUV, which was up 1.6 percent ($649).