I work in a Federal Building. There are 5 break rooms, each with 4 to 5 machines. Every night at 10PM I get up and walk to each room across the building and check the slot of every machine and the floor around it. I AVERAGE 1.20$ week, last year I hauled $33. I dont work 5 days a week every week, plus leave and holidays. Plus I get the exercise.
I have found dollar coins, Canada .25 50th Jubilee, and slugs.