What can I REALLY find in a dumpster?

I try to look for items that I can transform into something else. Go into older neighborhoods, that are revitalizing. I once found and old door. An antique door can have a plethora of uses. Two of them are a new table and a headboard. I found this old door in a dumpster, and turned it into a table, that can stand alone or as a sofa table. In order to keep with the antiquated look of the door, I spray painted it black, then took a piece of sandpaper and scuffed up the edges. I then went to my local home improvement store, and bought a 4x4 post, which I got them to cut into four equal pieces. I simply nailed the legs to the bottom of the table. This table costs me roughly $20 (0.99 black spray paint and the 4x4 post). Not too bad, for a brand new table.