18. Vinyl Records
When you go to garage sales, it’s very common to find old vinyl records. For years, this was considered outdated technology. But records have had a huge resurgence among audiophiles and hipsters. This is one of the niche areas where it’s possible for you to find something worthy of reselling. Many people run an entire business selling nothing but records. Most places will only charge 25 cents to $1 per record. One man found an incredibly rare Velvet Underground record at a yardsale, and ended up selling it on eBay for $25,000.
With that being said, you should be careful. Always check the records for scratches to ensure that it will still play. And it makes a lot of sense for you to own your own record player, so that you can test the album and make sure it still sounds good. When records have been stored in a hot place, they can sometimes warp and be distorted. So if you accidently sold a bad record, you might end up with an angry customer.