It is very difficult to beat either the American or the Axis. I would say the American is a little more refined as far as fit/finish, but they Axis is a tack driver that leaves more $ for extras like the scope. Take your pick.
I own 2 Axis and have helped another forum member with setup and load development for his 270 Ruger American.
IMO the used gun market is just crazy with people paying $$$$ basically for a beat up gun that will never shoot as well as an Axis just because it has a hallowed name from the past. You won’t find much, if anything, worth buying in your budget and what you will find won’t hold a group anywhere near the Axis or American.
As to where to buy, the big box stores have great sales on both the American and the Axis. Also check Bud’s Gun Shop online.
Grouse