Every now and then, people clean their houses to make them as presentable and livable as possible. During the cleaning process, they tend to sift through boxes to locate and discard objects that may be old, seemingly unusable, or invaluable. As it turns out, many objects people find lying around their houses can be worth a lot of money. Here’s a list of household things that may be surprisingly valuable for homeowners: 1. Gold coins Rare coins and notes, such as the Australian 1930 penny or vintage dollar notes, are worth their weight in gold today. Coin collectors across the globe tend to buy old coins for huge amounts in auctions.  Additionally, the value of gold keeps rising. This makes it a high-priced commodity at almost any point in time. 2. Sporting merchandise Iconic sporting apparel and accessories have the rare benefit of becoming instantly timeless when the specific sporting event they are associated with ends. For example, if someone finds a branded jersey they wore to an NBA or NHL final a decade or two ago, the likelihood of fetching plenty of dollars by selling the jersey now is very high. 3. Vintage magazines Old magazine copies tend to increase rapidly in value with time.