Packaging has more value than the marbles. I did not see any valuable marbles in the packages. The bumblebees in the first are the only "named" ones. I wish Gerald Witcher could get his book published. He has a ton of information on the dates, headers, etc. from MK as well as the marbles, history and more. The Gladding-Vitro bag is between 1969 and 1982 when Gladding owned Vitro. Others are generally from the 60's, maybe late 50's on the Rainbows.