Matrons in Mercedes, immigrants, rednecks, housewives looking over their shoulders, everybody is doing it. Not only money, but resources are saved and preserved by this sport.
Some people make a living doing it.
Neighborhood clean-up days are an excellent opportunity to find items that you can repair, use or sell. Frugal living's Dumpster Diving notes Garage Sales give you an opportunity to extract wealth from what you don't need any more, meet your neighbors and create less clutter and space in your home. What doesn't sell often gets put out at the curb at the end of the day and moves on to others. Take the concept of the library for books and extend it to useful things and your neighborhood can save a tremendous amount of material, energy and money. Have an automatic hold placed on it for you each month.