That’s a good way to discourage proper disposal.
Modern latex paints are accepted in normal household garbage in most cities if allowed to dry out first, but oil based paints should be collected at proper locations. It’s actually getting hard to find oil based paints for sale, but you want to encourage people to dispose of them properly. When someone discovers 10 old paints in the basement of an old house it shouldn’t cost $200 to dispose of them.
All of the counties I’ve lived in (USA) long enough to have material to dispose of have provided free hazardous waste collection sites. The only hassle was maybe dealing with the government employee who didn’t want to help you do the mandatory sign-in and the minimal paperwork some required.
My current city also has annual hazardous waste pickup days. They’ll advertise in your neighborhood with flyers explaining what they will collect and where to take it. Very convenient to drop it off locally.
Charging people for small scale disposal is a very bad idea.