Hey guys I've been a service rifle competitor for a while, and am trying to get into shooting .308, my coach is selling an M14A, the reciever is marked ( U.S RIFlE 7.62mm M14A FED. ORD. INC. So. EL MONTE, CA. ) I have no clue on the value, I've seen similar rifles go from $750 to $1800 but non...