I just purchase my first mini-14, it is a 180 series, built in 1976, i dont know very much about these guns. Is this a good gun, it is fairly plain, with a aftermarket 30 rd mag and a tasco scope, it is in excellent condition? What is the value of this gun? I was told it would be hard to find parts and that i should get rid of it. Any info or suggestions would be great.