Your grandpa's guitar
Every guitar player's dream is to lift a few boxes in their grandparents' attic, only to find a vintage Gibson or Fender chilling out in mint condition inside its original case. Well, it happens. And for those crazy enough to sell these beautiful instruments, they can score well into the hundreds of thousands. Or you could just play it. Even if you suck, you'll suck with impeccable class.
Homemade quilts are one of the most sought-after items by antique appraisers. In the 19th century, quilt-making was a common hobby for many women, and works from this period can be valued well into the $5,000 tier. You'd normally have to take your quilt to an expert to be sure, but many are kept and passed down within families who never really know how valuable they are.