In the Yellow Pages under Packing Materials you will find the best deals for supplies-as compared to the places you mentioned. Unless otherwise stated they all have city counters & will sell to you. The downside is sometimes the minimum purchase is a large quantity but not always. The smallest bag of packing peanuts at the place I use is 14 cu. ft. To go off on a tangent briefly I have to say that I've used lots of packing peanuts as the filler when double boxing & have never had a complaint, let alone a problem. When used correctly, just like anything, they do what they're designed for.
I have a never ending supply of boxes and in fact I drove by a store today that sells ceramics, lights & such & there was a pick up truck load of boxes just sitting there. My "shipping dept" (attic) is loaded so I didn't bother stopping but just start asking around-maybe where you work if they have a receiving dept. or mailroom or anyplace you can think of that may be willing to part with some boxes, like an auto body shop. It's doubtful they'll be sending that fender back to Detroit.
One more thing to add. I've been in a lot of grocery warehouses & I would never bring a grocery store box into my house. I hope everybody reading this really does wash the tops of their cans off before using them, especially soda.
I have a never ending supply of boxes and in fact I drove by a store today that sells ceramics, lights & such & there was a pick up truck load of boxes just sitting there. My "shipping dept" (attic) is loaded so I didn't bother stopping but just start asking around-maybe where you work if they have a receiving dept. or mailroom or anyplace you can think of that may be willing to part with some boxes, like an auto body shop. It's doubtful they'll be sending that fender back to Detroit.
One more thing to add. I've been in a lot of grocery warehouses & I would never bring a grocery store box into my house. I hope everybody reading this really does wash the tops of their cans off before using them, especially soda.