I think my car is a sub 10k car now according to KBB. But I love it. You are still buying the same car that a few years back cost 30, 40, 50k for under 10, it just has a little more experience and character now. There are TONS of cars that I would buy and be happy with that are 4-figure cars.
90s japanese sport cars (the turbo ones) can be had for under 10, unless its an overpriced supra (thanks F&F)
Older Audis, BMW's, maybe a mercedes or 2
I would like to have a newer diesel volkswagen, jetta perhaps.
Some of the cars in the 80's would be cool too if they are in good shape, like a starion or a nissan Z.
List goes on.