I have not sold per say, however I have traded and when I have it has been an improvement over what I was trading. I have found sets such as the Four Horsemen of the Apocalypse (Still have a whole set that may leave me one day lol) and rounds that are limited mintage such as the Privateer series do well. Also, first time items like the Chiwoo and the beginning of the Zi:Sin series are usually good. Then there is the specialty items like the Steemit rounds. I wish I could have purchased so many more, but two was my budget and two I got lol. I did very well on trading the first one.

I will keep buying and scaling up. I am in it for the long term and I will not be trying to pull out my money for at least twenty or so years so I know it will retain value while poor financial decisions by governments continue to hurt the dollar.
Thanks for sharing my friends!!
Thanks so much for a great question.