LGS here in the valley has two racks full of used AR’s ranging from pieced together stuff to sigsauer AR’s. Low end price $400 plus to high of $1000 plus. But i will never buy a used AR I seen what people do with them at range. One 30 round magazine after another barrel screaming for mercy. When I can just buy parts kit stripped lower from psa be into the build for less than $400. Majority of folks who own these AR’s are not shooting matches with them. They are shooting ball ammo and could give two chits about groups at a 100yds. In the good ol US Army we do a 25meter zero for 300 meters and our carbines/rifles are ready to go.