There used to be an all you can eat sushi place here when I was a kid, it didn't last too long, only a few months, but they had all you can eat 'craft your own' sushi, you could choose they type and filling and they'd make it for you, they had a BBQ grill at each table you could get pieces of meat for, they had a noodle bar with a bunch of different noodles and broths, a rice bar with a bunch of different kinds of rice, meat and vegetables for the noodles and rice, and a grill you could get freshly fried up meats and vegetables, all you can eat for everything with no limits for $20 Canadian circa late 90's/early 2000's.

My dad took us there a few times, he still talks about it and how sad he was when it closed down. He figures it just wasn't economically feasible. You got ridiculous amounts of really good, fresh food for fairly cheap. Far cheaper than ordering individually. We usually ended up eating until we all felt sick.