"Many used SUVs, even those with greater fuel efficiency, are selling below market value because of the growing supply on dealers' lots, so buyers can be choosy about the next vehicle they purchase," said Larry Gamache, communications director at Carfax, the organization that ran the study.

Gamache says there's been a dramatic increase in consumer activity at carfax.com over the past year for SUVs and crossover vehicles, some by as much as 3,000 percent. The Web site allows shoppers to run a vehicle history report, checking for past accidents and major damage on the vehicle they are considering. Additionally, the report highlights attributes such as low mileage and regular maintenance to help people find the best-value SUV.

So which SUVs are people researching on the site?

• Searches on the Kia Rondo were up 3,600 percent from a year ago, while searches for Jeep Patriots and Buick Enclaves were up well over 2,000 percent.

• Searches for the Mazda CX-9, Land Rover LR2, Saturn Outlook, Lincoln MKX and Suzuki SX4 were up more than 1,000 percent.

• Hyundai Tucson and GMC Acadia searches were up over 900 percent.

More than 32,000 dealers across North America subscribe to Carfax and millions of free reports are available online for used cars and SUVs listed by participating dealers at places like AutoTrader.com, cars.com, AutoMart.com and Yahoo! Autos. For more information, visit www.carfax.com.

A study found that an increasing number of consumers are researching used SUVs.