Aluminum and tin cans that are vintage, either empty or full.
I found an unopened can of water from Anhouser Busch, donated for one of the hurricane disasters. Those are indeed sellable, esp for the various named hurricanes. Mine is from one of the big storms - i forget which offhand.
Metal spice containers, vintage or not. You can still get pepper in the metal ones, but not much else, I think.
Almost any metal food containers with logos on them - these are changing quickly over to plastic in most businesses.
Metal maple syrup containers in the shape of houses.
Aunt Jememima syrup glass bottles.
Metal bandaid containers. I think they are all vintage now.
Baby spoons. Salt spoons. Travel collectors spoons.
Metal tool boxes or tackle boxes.
Metal first aid containers, esp with the big Red Cross emblem on it.
Metal street signs or business signs of any kind.
Wooden business shingles.
License plates from anywhere. They go from $1 each for common ones to a LOT, for the rarer places.
Any tableware with celluloid or bakelite handles, or ivory or bone.
Pez containers, old or new.
Sturdy wooden picture frames always have value. Gilded plaster frames, even if falling apart.
Vintage mirrors.
Mid-century is a HUGE thing right now, in any category of housewares or furniture.
Legos, as someone mentioned elsewhere.
Even cardboard bar coasters from around the world.
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