I couldn't find a good existing topic for this, so I created a new one. What are the priciest, most valuable games in your collection?

Extra credit: What is the approximate value of your entire collection (software and hardware) in US dollars? Is it enough to retire with?

The most expensive game I had (as far as I was aware) was a complete, mint copy of Shantae for the Game Boy Color. I sold it on eBay for $688.89 during December 2017. Not too bad for a game for which I only paid about $20 or $30 in 2003!