First budget AR

So, in response to (living in Virginia) the plethora of gun control laws about to come upon the state, I’m gonna get my first AR. Was initially gonna wait til I had a better income, but I think something is better than nothing. Any rifles in the 400-600 dollar range you’d recommend? Not needing a “beginner” rifle, I know how to shoot and gun safety, just wanna know what the best budget option is. Thank you!