Maybe this counts because it was from the curbside, but several years ago I was escaping from a strip of warehouse stores (Best Buy, CompUSA, etc.) through the back of their lot and behind the Toys-R-Us was a huge rolloff dumpster and the employees were hauling out and throwing away their warehouse shelving and hardware (the big green-and-orange steel shelving you see in Sam's Club and places like that). I asked what the story was and they explained that the manager had told them to get rid of all ther warehouse shelving and then they were going to buy all new warehouse shelving. They said that I was welcome to anything I wanted as long as I got it before the rollowff dumpster got picked up next week.
So for several days I made a couple of trips a day with as much of the shelving I could stack on top of my jeep without the tires blowing up. I've got a three-car garage with a loft, but it's pretty big for a three-car garage since it's got extra-high ceilings and one of the spaces is designed to fit an RV. So I built what was for a time a "Jungle Gym" of industrial shelving (with spaces for cars and "bridges" going across up above. That was a lot of fun, but now it's all filled with computer equipment and grip-and-electric.
I don't know how much it would have cost to buy, but it made me happy. That Toys-R-Us closed down about a year later.