I have only seen one and sold for more than $400 at a recent auction and was in about 50% condition. In fact the high bid was $475 + 15% buyers fee + 6% sales tax + $5 NICS call. You got a great deal.
US Army 1953-1977
‘‘We, the People are the rightful masters of both Congress and the courts — not to overthrow the Constitution, but to overthrow men who pervert the Constitution.’’
— Abraham Lincoln