About 46.4 million used vehicles were sold in the United States and Canada in 2005, according to the ADESA Inc. Global Vehicle Remarketing report released here Sunday.
Tom Kontos, vice president of industry analysis, said franchised dealers sold about 17.3 million used vehicles last year, a 3.1 percent increase over 2004.
He attributed much of that growth to trade-ins that domestic-brand dealers took in during the Big 3 employee discount incentive programs offered to consumers last summer.
Kontos says dealers retailed the vehicles they took as trade-ins rather than sell them to auctions.
Used-vehicle sales by independent used-car dealers were down 3.7 percent to 14.7 million units. Sales by private individuals increased about 12 percent to 14.3 million units.