Helping a friend organize her late father's chip/token collection and have come across several of these smaller denomination slot tokens. Mostly from AC, Indiana, Illinois and Iowa casino. I'm clueless about these as I didn't even now they existed....would think it would cost more to produce them rather than using actual US currency.

Are there collectors out there for these?
Are they rare?
What type of fair market value would one use to price these for sale?

Thanks