I'm not necessarily promoting this, but a seller at the market i frequent has sold over 100 of these, for spider repellant. Some customers swear they work, no one has complained (maybe they are too embarrassed?).
They are being sold for $1.00 each!!!
Not bad for something most people consider worthless trash, or fodder for boyhood fights. They are also called hedge apples, bois d'arc, or osage oranges.
The customer base is mostly city slicker(Chicago) retirees, but buyers include the local Ozark folks here too
Here is a link that might be useful: These people sell them online- $2.00/ea+s/h