Sales of used Class 8 trucks dropped 3 percent year-over-year in January and were down 6 percent from December, according to ACT Research.
"It is now a buyer's market," said Steve Tam, vice president for the commercial vehicle sector at Columbus, Ind.-based ACT Research.
"While one data point does not make a trend, longer term softness is in line with expectations, as new truck buyers have held onto their equipment longer before trading," he said.
"The net effect is older, higher mileage (used) trucks (for sale), which translates into lower prices," said Tam.
Auction and retail used truck sales dropped 11 percent in 2012, according to the vehicle market research firm, while the wholesale market increased volume 3 percent.
Orders for new heavy-duty trucks rose for a second straight month in January and remained above 20,000 for the fourth consecutive month, according to ACT.