I'm interested in buying items that you would most likely discard or otherwise recycle – things that are byproducts of what you're selling/producing.
Some examples that I can think of…
Buying cracked or otherwise broken windshields from an auto repair shop/windshield replacement shop
Buying shorted circuit boards from a repair shop or computer retailer
Buying liquor/beer/wine bottles from bars
Buying scrap wood from a lumberyard/carpenter's shop
Buying… well… you get it.
How should I approach your business? I'm imagining that I wouldn't get far by just walking in the door and making my offer to an employee, so should I request a manager? What about asking to speak with an owner?