I was in a rush withdrawing money from an ATM, and I accidentally pressed the 'Fast Cash' button for $60 bucks. But lucky me two $20 bills were stuck together and I got back $80.
I bought a Win-For-Life scratch off once, and immediately scratched off two 'LIFE' symbols. It was pretty exciting, so I forced myself not to scratch off the remaining four slots for a while, to keep my hopes up through a boring work week. I convinced myself to scratch off one space per morning. By the fifth day, I had LIFE, LIFE, $100, $10, $100. I finally gave in and scratched the last symbol and....nothing. Literally nothing, like the printer ran out of ink and just stopped printing in that square. I eventually drove to a convenience store and complained and the clerk said he could look it up by its serial number. So he did, and it was a loser.
My girlfriend's mom just moved into a new house, and found a small cardboard box hidden under the basement stairs. She dusted it off and opened it up, and found a collection of about 20 miniature vintage alcohol bottles. They were easily over 100 years old, some of the companies weren't even around anymore. The alcohol evaporated in some containers but most were in pretty decent shape, although I don't think anyone plans on drinking them.
I was shopping for groceries one day and my mom called me and asked me to pick her up a lotto ticket. I've never played before but since I was buying one anyway I decided to give it a try. I told the cashier what numbers I wanted for my ticket but he had an extremely thick accent and I could barely understand what he was saying. When I got home I noticed that he screwed up two of the numbers I wanted to use. I was pissed off, but I watched the drawing anyway and won a partial prize of $3000, thanks to the two numbers he screwed up!
My dad asked me to stop at a flea market to replace the battery in his watch. There was a long line of people at the stand, so to kill time I was looking through a basket of random foreign coins for sale. I picked up four of them that looked cool and bought them all for $1. I went home and tried to identify them. Three of them were pretty easy to find on the internet and were worth less than my dollar. But I couldn't find the oldest looking one because it only had symbols on it. I finally posted a picture of it on a coin collector's forum, and someone was able to identify it as a rare Japanese coin I couldn't pronounce. I sold it online to a collector for an easy $200.