They are all over. Head over to zillow/redfin (or the corresponding real estate site for your region) to see them. They won't be in the hip city center everyone wants, but choices are plentiful if one is willing to sacrifice a few wishlist items.
"Cheap" is of course relative the the region/country so actual numbers will vary. I'm in California so I can give a California-centric answer.
Browsing zillow I see over 30 condo (and a few house) units for less than 200K in the Sacramento areas (not exactly the boonies, it's the state capital).
In the Fresno area I see around 60 units (many houses) under 200K. Some friends moved to Fresno and they have a very nice place, for pennies on the dollar compared to San Francisco.
For those who don't want a big city, head north of Sacramento towards Oregon and tons of choices to work remote and buy a place cheap.
Mind you, I set the search limit to <200K, but that's extremely cheap by California standards. Even 25 years ago 200K was a cheap house in California. If you increase the search criteria to a more reasonable 300-400K there are way more choices and areas.