7. Old Calendars
Kids love collecting their old calendars, and if you still have a bundle from your childhood, you might be able to trade it in for some cash. A calendar displaying a product such as Coca-Cola could sell for thousands if it has an early 1900s date. Or one from prior to the 1970s can bring you in at least $50 to $300. Rifle through your old collection and see what you have in mint condition.