At-15,, Is this decent stuff

I’m kinda interested in this rifle. Help me out. Is this decent stuff and what a guess on what it’s worth.Thanks

AR15
Nickel Boron Bolt
Palmetto state lower and upper
Hogue Grip
Troy Rail
Magpul accessories
Less than 300 rounds through it
Primary Arms 30mm red dot

Who made the barrel and trigger? The barrel is a major piece in my mind.