CAMBRIDGE, Mass. –

As supply continues to expand, auction and retail prices of used vehicles are expected to take a downward turn.

And the second half of the year has brought with it signs of a price turnaround on the lots — which will perhaps serve to bring more used shoppers into dealerships this holiday season.

Though many shoppers are too busy buying holiday gifts to focus on a purchase as big as a vehicle, the following statistic might turn some heads: According to third-party site CarGurus’ Used Price Index, used-car prices have dropped 5.4 percent since their May high.

The average price of a used car is now $18,469, according to the site. This downward movement reflects what CarGurus’ analysts are calling a seasonal trend and project prices will continue to drop by as much as 2 percent through the end of January.

“For used-car shoppers, it really is the most wonderful time of the year to find a great deal,” said Dave Galvin, director of data analytics for CarGurus.

The site reported the primary driver of recent used-price declines is a seasonal decline in shopper demand. While spring and summer months normally bring high used sales activity, the second half of the year is traditionally quite a bit slower.

Consequently, dealers are adjusting prices accordingly in an effort to attract potential buyers and make room for inventory in the new year.  

Cargurus analysts also noted “consumer shopping interest typically comes back strong by January, and prices follow, rising again in February.”

After a February bump, used prices are expected to continue increasing through tax season.