Marvel Action Figures
With the MCU's considerable rise in popularity over the past decade, Marvel action figures have become even more valuable, depending on their age, condition, and likeness. The Marvel Cinemaquette Toynami Iron Man Mark 43 recently sold for $2,300 on eBay.
Yu-Gi-Oh! Cards
This card game is based on the fictional game of Duel Monsters where cards are used for battle. On July 7, 2009, the Yu-Gi-Oh! the card game was named the top-selling trading card game by Guinness World Records. These cards are some of the most valuable collectibles in the world—the Blue Eyes White Dragon card is worth up to $13,000.