My name is ***** ***** I'm happy to help.
I'm a collector of handmade marbles myself.
There's n one in your area who specifically says he/she is an appraiser of handmade marbles, but the Iowa Marble Club in Prairie City should be able to help you.
Here's their contact information:
Iowa Marble Club
9717 W 93rd St S
Prairie City, IA 50228
They sponsor an annual marble show, just south of Des Moines, and there should be many dealers there who would be happy to help you. It would also be good to walk around the show to see who has marbles similar to yours and what their selling prices are.
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