If it was imported it was probably CAI, St Albans, VT (Century International Arms) and would be marked on the barrel by the front sight or somewhere on the receiver. Blue Book value is approx. $275 at the lower end up to $600 for an EXCELLENT/like new rifle. Most of these were well used(AKA "beat up") by the Israeli's and usually fetch around $200 more or less. The bayonet is a plus.