Oh, where to begin?
-Used nail file to try and bring out the details on a darkened 1861 Nova Scotia 1 Cent
-Threw out a 1921 1/2 Crown because I thought it was fake after weighting it; discovered same day that it was my scale was what was off, and had to rummage through trash to find it.
-Dropped 1826 Penny into eyeshadow; long story short that's why I have a glittery George IV penny.
-Gave away a Singapore $2 commemorative coin to a relative as a birthday present because I thought it was worthless exunomia (wasn't listed on the site back then)
-Lost a 1929 Thailand 1 Baht coin
-Lost a 1945 British India 1 Rupee coin