Looking at the data behind the article on iSeeCar:
"Twenty-five vehicles can be found with savings of at least 10 percent below market value. Sedans are the most represented vehicle category on the list with 11 followed by SUVs with six, hatchbacks with four, two pickup trucks, one minivan, and one convertible."
For whatever reason, the American buying taste has gravitated over to SUVs/Crossovers to the point that Ford has abandoned sedans (with the exception of the Mustang) for its new car designs. Only foreign manufacturers are continuing to develop/improve sedans. So it's not surprising that there is savings to be had when looking at 17 of the 25 being non-SUV/truck. I don't know how popular pickup trucks are outside of Texas (they are pretty popular here).
Car sales in the DFW area have rebounded greatly since March. With the auctions being closed, the were no used cars, now that show room sales is less restricted and the manufacturer's incentives, there is a concern that there will be a shortage of new cars. Some are looking at other parts of the country which are slower to recover as a source of inventory. Again, this would mainly be SUVs and Crossovers.
I did a search in my area on Hertz' site:
Car Model | iSeeCars Price (average) | DFW price (low) |
Chevrolet Silverado 1500 | $24,265 | $31,750 (6) |
Toyota Tundra | $31,383 | - (none within 200 miles) |
Chevrolet Trax | $11,196 | - (none within 200 miles) |
INFINITI QX50 | $27,760 | $27,900 (1) |
Cadillac XT5 | $29,647 | $30,800 (3) - $35K next step |
BMW X3 | $29,073 | $28,800 (1) - $37K next step |
Hyundai Santa Fe Sport | $13,647 | - (none within 200 miles) |
Mitsubishi Outlander Sport | $13,528 | - (none within 200 miles) |
Expanding that search to 200 miles would go as far north as Oklahoma City and as far south as Austin. IDK if Hertz would do dealer transfers.
While I could find some cars at the low end at what iSeeCars claimed was the average, it was not the average pricing I saw as a SWAG.