The master of curbside/roadside picking is rburg-I'm waiting for him to chime in.
We weren't all born rich. Caje just has to keep reminding me how poor I was (and am.) Not a lot in the upstairs of my wifes new house (aka our retirement cottage on the river.) She's kind of embarrassed about my impoverished ways. 40 years ago we lived in an area of hospitals and a university. I was still a student, she was a new RN. They were remodeling the complex and replacing all the nice wood doors with metal (so the thieves couldn't kick them in.) One day I went out to the construction dumpster and "harvested" two of the better front doors. I cut the one that became the table top right at the eye hole. Then again stripped off the doorknob hole. Those pieces became cleats for the legs, which were made from 29" sections of the other door. I know that because one is gone, and I need another 29" leg. The top is still my workshop table.
This stuff embarrasses my wife beyond belief. But she has hobbies, too. And she covets my sturdy table (and I won't give it up!)
But last winter I got a phone call from her at work. I'm retired remember. They were remodeling in her medical building, and were throwing out a bunch of really nice office doors. So I got my oldest and away we went. I've got enough door wood to make 4 full tables (remember code says front doors in offices must be at least 3-0 so I can again strip off the knob hole. What embarassed her even more is I scavenged all the industrial quality hardware. Ball bearing hinges! and nice levers instead of knobs. But she wants the doors for sewing and for her stained glass hobby. Solid wood doors are so strong you can drive a truck on them.
I worked for the last few decades in a consumer products company. We tossed out everything after we couldn't sell it. I have no pride, but I did have keys to the dumpster yard. Just tonight I gave away the last of my copper scrap. The deal is my neighbor needs my 2 sticks of 3/4" copper pipe (I don't, the new house has PEX). He's going to scrap all my copper and give me the money, he gets to keep the pieces he needs.

It includes a 6' length of 4" A/C tubing, probably weighs 50#. All scrounged.
No one would belive how impoverished I imagine myself to be. I do know my attitude pervades my life. I feel poor, so I scrounge. I never pass up a yard sale, either. I do my best to find junk and convert it to money, or better junk. Sometimes I just hoard junk.
Insanity is hereditary. I got it from my father. He lived thru the depression, so he felt poor. I grew up having it beaten into my head that someday, I'm going to wish I had that old bolt or screw. But if you need a bolt or screw, you've got to drive to Home Despot or Auto Zone. I save the fuel and go to the garage (then spend more time looking than you spend driving, buying, driving back and making your repair.) But if its Saturday, I win.
Pride is foolish. If its free, its also mine!