My wife and I collected "slag glass" and McCoy pottery together for many years. Auctions, flea markets, estate sales, yard sales--etc etc.
Then one day at an antique mall in Oshkosh WI we found this book by the Hardy’s--What? They made marbles too??
This pushed the limit for me--then I found a book by Everit Grist--off we went.
Of course we had friends that collected other things that thought that we were "nuts" about collecting marbles.
I had a friend "gift me" a coffee can full of marbles from her ex. I dumped them out and said---oh no--These are too valuable for a gift. About $7,500 later she knew.
This was about 30 years ago and they still hold their value.
About forty books later--here I am.
Then the internet changed it all.
I still have the marbles that my mom gave me from her dad--one was beat up like Chads Akro slag ( nice one by the way)--mine was a Oxblood Eggyolk--just a killer old used up marble. Grandpa played marbles---no doubt.
Marble--On!!