Some quick numbers here. Inflation over the last 20 years was about 54%, so I would expect an apples-to-apples vehicle to cost that much more today than it did in 1999. If you look at the CPI-based numbers for cars from 2000 to 2019, in real dollars it's barely gone up [1].
I think what you're seeing is that the cars getting advertised, and more specifically the cars that you want are more expensive than they used to be because auto makers are trying to boost margins in a shrinking market by pushing fancy features and higher-end models. But if you look at base-model sedans, they've stayed pretty close in price over the last two decades.
Is it? I’m still driving the same car I bought 10 years ago so I’m genuinely not sure. At the time, I ordered it from the Honda fleet manager at a dealership and getting a base model was no problem. If you’re walking into a dealership or want a car ASAP then you’re probably right, but I feel like if you can wait a couple weeks getting a base model is still relatively easy.
When I bought my Kia it definitely was a problem to get the low end model. There was just one base model on the lot vs. many cars fully decked out. I guess not many people buy base model these days.
I think what you're seeing is that the cars getting advertised, and more specifically the cars that you want are more expensive than they used to be because auto makers are trying to boost margins in a shrinking market by pushing fancy features and higher-end models. But if you look at base-model sedans, they've stayed pretty close in price over the last two decades.
[1] http://www.in2013dollars.com/New-cars/price-inflation