You might find some used ones but most if them are probably in landfills.
Back when phones were not yet the fully ubiquitous answer, there were very small primitive digital camers for absurdly low prices at places like Walmart. Cheap little cameras in blister packaging hanging on pegboard retail cdisplays.
I still think the Contax I4R is very close to the size of the 110 camera. I wanted it but I said wait until it's worth next to nothing to buy it. How wrong I was. The price on that used (must be close to 20 year old now) is more than price new.
My first digital was about the size of a credit card, and less than quarter inch thick. It lacked a screen; second model had a screen and was little more than quarter inch thick. Can't remember the brand.