In that price range you're probably going to be seeing a lot of the following:
Ford Edge
Ford Escape
Ford Explorer (will be higher miles in your price range)
Mitsubishi Outlander
Chevy Equinox
Jeep Renegade & Compass (avoid, seem to be generally problematic)
Buick Encore
Nissan Rogue (avoid models with the CVT transmission)
Toyota RAV4
Kia Sorento
There are others, but those are the ones we see a lot of around here. If you limit yourself to lower miles, say anything under $22k with less than 30,000 miles, pickings get pretty slim and a lot of them are Jeep Renegades. I've known several people with Renegades & Compasses and they all had problems. The only thing I'd personally buy from the list is a Ford Escape. They seem to be decent, honest, reliable transportation if you stay away from "don't buy" years.
Also, I notice the Kia Soul can be had new for under $23,000 in some configurations. It might not be the fanciest car ever, but there's something to be said for having a warranty and presumed reliability of a new vehicle.