I would have interest in participating in an auction for some magic cards; I used to play as a kid, but never really had any cards of my own.
It would surprise me if there wasn't others with a similar interest around here.
I guess it depends on how big your imagination is imho. Building different kind of decks can be fun once you get into it. Players of all ages play, trade, & compete at the local card shops around the world. Artists and developers are still creating interesting monsters, lore, and abilities. The new set Kamigawa: Neon Dynasy for example is a Neo-Tokyo, Samurai, Cyberpunk themed set with amazing land art.
A new format called Pioneer, came out 2019:
https://magic.wizards.com/en/formats/pioneer