Kansas Quarters
Average original price: $0.25
Potential earnings: $100
The coin maker made a smudge on the letter “T” on the Kansas coin in 2005, and for a while, there were a few coins that stated “In God We Rust” Luckily, the mistake was soon forgotten when more coins were inserted into the circulation that didn’t have the same mistake. Now, these quarters are worth a lot of money. In fact, if you still have a coin with a smudge on the letter “T,” you can potentially make $100 off it!