There’s a market for gently used clothes. You can sell clothes online to consignment, secondhand stores, or directly to consumers.
Rather than feel guilty about being a shoe hoarder, sell off those unworn shoes and remove their boxes.
Another way to make money is to sell baby gear you don’t need anymore.
Selling jewelry is a different ballgame depending on the type of jewelry you wish to trade.
Like jewelry, depending on the brand and condition of your watch, you may want to get an appraisal and contact places like Crown & Caliber that buy and resell luxury watches.