I would take my chances going with an auction.
Buying at auction gets you cars that 100 professionals have already looked at and passed over. And they know more than you or I.
Best spot (in my area) is still facebook marketplace. Not just the car section but general for sale, (town) for sale, garage sale, etc. Find a moron who just wants to get rid of "trouble" and show up with cash fast.
ATMs limit to $500-1000, so cars over that won't sell in the evening when banks are closed. Many do not carry cash. Be contrarian.
Best example is a car called
"Yes"
because the facebook form asks for a title, and they think it means vehicle title, not title of the ad.
Prepare to do a little work, but morons get rid of cars when they need "just one more repair" after shelling out for half a dozen other needed ones.
Back in the "old days" I got a ten-year old saturn for $250 that needed a thermostat and four (used) tires. It was february and the car had no heat and was worthless in the snow. Chick bought a Jeep LIberty to "solve" all her problems.
If you look at the pictures in the ad and there's trash on the floor and moon-dancers hanging from the rearview mirror, that's the car for you. If you see antifreeze jugs in the trunk, run like the wind!
You can spot scam ads on FBM by the breathless description of how perfect the car is, a picture with it just washed, and a generic background that doesn't really look like the houses or pavement around you. There'll be weird JPG compression artifacts too, some way of avoiding a clone detection algorithm.