Used cars are sitting on lots longer and longer, according to data compiled by iSeeCars.com.

Despite used-car prices dropping slightly at the beginning of the year, the average days on market for 1- to 5-year-old units increased 40% year-over-year in February. At 53 days, that's the highest point since January 2024, the car search and data provider said.

“Used car prices have stabilized over the past 18 months, and they actually dropped slightly in January and February,” said iSeeCars Executive Analyst Karl Brauer. “But it’s still taking longer to sell these cars, as more consumers either hang on to their current vehicle or shop for older used models to save money.”

Within the used-car market, electric vehicles are selling faster than the overall average at just over 47 days as of February. But there are fewer of them, and that number is still up year-over-year by 13%.

“With electric vehicles making up a tiny fraction of the used car market it takes less demand to keep them moving off dealer lots,” Brauer said. “And with new EV volume and sales dropping in recent months, it’s likely the used EV market will remain relatively strong.”

Brand-wise, Tesla makes up the bulk of used EV sales and is pulling down the average EV days on market, according to the study. Of the 20 fastest-selling 1- to 5-year-old used cars, Tesla has four models, including the No. 1 spot held by its Model X at 22 days on market.

On the flip side, nine of the slowest selling used cars are EVs, notably non-Tesla models. And 15 of the 20 slowest-selling models are alternative-fuel vehicles. The Volvo XC60, a hybrid, is listed as the slowest selling 1- to 5-year-old used car.

Meanwhile, new cars' days on the market have fallen in the past two months by 15% year-over-year. ISeeCars named the electric Chevrolet Bolt the fastest-selling new car at just nine days on market. The slowest-selling car is the electric Hyundai Ioniq 5 N at a whopping 196 days on market.

“Until recently new car sales had been pretty stable in terms of speed,” Brauer said. “But January and February saw the biggest slowdown in sales over the past year, suggesting we may be at the start of waning new-car demand.”