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12. Vintage Vacuums
Not everyone tosses their old cleaning appliances once they replace them with newer models, so if you have a few of your (or your mom's!) old vacuum cleaners lying around, you might be able to swap them in for a little spending money.

There are collector societies for all sorts of vintage things, so your 1950 model could potentially be worth thousands. One sought-after model is the Regina Model A built in the 1940s, and it currently sells for $150.