Rental car companies typically sell cars from their fleets already, after a certain period of time or amount of use. And with travel so limited right now and demand for rental cars far lower than average, companies are offering big discounts for their car sales.
For instance, I checked the Hertz Car Sales website for Toyota Corollas and found a 2020 LE model with 21,000 miles listed for $14,500—two grand below the lowest end of the fair-market range for the car based on Kelley Blue Book’s data for my region. Hertz advertises no-haggle pricing, which means what you see is basically what you get—no nerve-wracking negotiation required.
With pretty much every rental company trying to sell their excess inventory, it’s likely the influx of new sale listings will push prices down further.