#3: Model Trains

Collecting model trains can be a delightful and rewarding pastime, but you might want to hit the brakes if you’re eyeing a financial windfall. While vintage sets in mint condition with original packaging can command decent prices, most newer models aren’t worth much more than what you paid—if that.

According to the Lionel Collectors Club of America, the value depends heavily on rarity, condition, and whether you kept the box. So, enjoy the hobby for the joy of the miniature rails, not the promise of striking it rich.