keys in Milwaukee area (4500 N Sherman)

For doors, cars, even car fobs

Any modern-looking keys that are not being used.
Looking for at least several dozen for a prank.

Have you forgotten what it goes to? Lost that lock? Sold that car?
Have a box of "what's this to?" keys you want to get rid of?

I'd prefer free, but am willing to negotiate for a box full of useless-to-you keys.