I sold off some of my books before, ones that I hadn't used or even looked at in a while.
I regret it so hard.
Ignoring the sentimental aspects (which is significant for me), if I decide I want them back I now have to pay probably double or more what I sold them for.
I will probably never sell anything again unless I have multiples of it.
Running a D&D5e game. Possibly the last one I ever run. It's a blast though, and the players are amazing. The MCDM Flee, Mortals! book is really helping make it interesting to run.
I'm getting ready to start an Iron Kingdoms Savage Worlds game. It's a one-shot, but if they like it, we'll continue it into a campaign.
I'm also possibly going to be starting a Pathfinder 2e game soon. I've ran it a bit, but I still don't feel like I know it very well, so I'm going to run the Beginner Box (possibly lead into Abomination Vaults) on Foundry. It's a weird experience feeling like a newb again, since I haven't really felt that way in decades. Most games just aren't that challenging to master.
I am a big fan of Iron Kingdoms, which is steampunk fantasy (somewhat similar to Victoriana in that way, though it often bleeds over into dieselpunk). The game is not very easy on the GM though, so I use Savage Worlds to run it. While it may be a stretch to call Deadlands "steampunk", the rules do handle steampunk really well.