Various matters in life can be related to the cryptocurrency world; this is a successful arbitrage. I added some descriptions and took more pictures, then sold it at a higher price. Of course, this should not be imitated, because while buying low and selling high is good, there’s also the possibility of not being able to sell, or buying high and eventually selling low. This merely illustrates a principle: always be on the lookout for things around you that have a price premium.