30Fortune: Vintage Board Games ($100 - $400)
While most used board games aren't worth more than the dollar or two they can get at a yard sale, there's actually a surprising amount that can be worth up to thousands due to their rarity and "vintage" status. For example, the 1986 Fireball Island game regularly sells for between $300 and $400 on eBay, while a 1991 Tornado Rex game sells for between $100 and $200.
Now, it's true that not all vintage board games will go for that much money (especially those that no longer have any kind of following or those that have been mass produced for decades and still have plenty of current editions). But considering many old games are inherited for free and/or were initially purchased for far less, sellers can still profit.