ATLANTA -

April was a familiar scene in the certified pre-owned and late-model used-car markets. 

Sportier vehicles were in high demand and low supply, with one brand drawing the most interest: Porsche.

The certified Porsche models, in particular, are gaining considerable steam with shoppers.

According to the April installment of Autotrader’s Scarcity report, two CPO Porsche models were the most difficult to find certified vehicles in the country.

The Porsche Cayman was once again the most scarce CPO vehicle nationally, followed by the certified Boxster.

The CPO Boxster was sixth in March on the certified scarcity list, but as the CPO Cadillac Escalade fell off the list entirely in April, the Boxster took its No. 2 spot.

“As was the case in March that marked the official arrival of spring, sporty cars made up the preponderance of vehicles on Autotrader's April scarcity list,” said Autotrader senior analyst Michelle Krebs. “In the months leading up to March, many of the vehicles on the list were trucks, sport utilities and crossovers.

Taking a look at regional results, the CPO Boxster topped the list of most sought after models in the Atlanta and New York, Autotrader reported. And the CPO Cayman came out ahead in Los Angeles.

Sportier models dominated the late-model used lists, as well. On a national basis, the Nissan GT-R came in at No. 1, followed by the Audi TTRS, and once again, the Porsche Cayman showed up in the third spot. The used Porsche Boxster was at No. 4.

 “The fact that spring has arrived and sports cars are back in fashion combined with the extreme desirability of Porsche vehicles account for the two Porsche models leading the scarcity list,” said Krebs. “But so, too, does Porsche’s strong certified pre-owned program, which Autotrader ranked as 'easily the best in the industry' in the U.S."

Krebs pointed out that the Porsche CPO program is offered on vehicles up to 6 years old, and some CPO models can be up to 8 years old and still be covered by the automaker's factory warranty, helping put shoppers’ minds at ease when shelling out for a high-end luxury unit.

 Highlighting a few other brands that touted sporty vehicles in high demand, the CPO Chevrolet Corvette came in at No. 6 on the certified April scarcity chart, up from No. 8 in March. This model was also particularly popular in Washington D.C., topping the list in the nation’s capital. The CPO Corvette was also No. 2 in Atlanta and Dallas/Fort Worth, No. 4 in New York and sixth place in Houston.

 Subaru, “known for long-lasting brutes with all-wheel drive,” Krebs said, had two models make the lists — both sporty.

The CPO Subaru BRZ was up to the No. 5 spot on the national list, after coming in at No. 9 in March, and the certified WRX came in ninth.

On a regional market level, the two Subaru units made the least available list in New York, Los Angeles, Boston, Houston, San Francisco/Oakland/San Jose and Philadelphia.

“Subaru, in general, has been enjoying spectacular success, setting new sales records for the past seven years and is on its way to its eighth record. The only thing holding Subaru back is capacity constraints,” Krebs said.

Click below to view the complete late-model used and CPO scarcity charts for April, provided by Autotrader.