Vehicles under $15k are 1.6% of the market, and their share of the market has dropped over 90% since 2019. The old advice that you can get a beater and drive it in to the ground for $5k hasn’t been true for years but it still seems pervasive in personal finance spaces.
That was definitely my experience buying a car a few months ago. My car was totaled so I had to buy a replacement unexpectedly. I was seeing used cars with 30,000-50,000 miles selling for more than MSRP and new cars were very hard to find. I ended up buying a new car that was less expensive than the used cars I was looking at and ended up getting a much lower APR due to the fact that it was a new car.