The jumpstart adventure for Occult City, a pulp/superhero/horror setting for Savage Worlds. Technically it's free, but I backed the Kickstarter, so I consider it a 'purchase.' Which is why I'm not an accountant...
FoundryVTT versions of Building Better Worlds and Destroyer of Worlds.What is the most recent TTRPG product you have purchased? No limits on what: book, PDF, dice, software, minis, whatever.
What make you pick it up? Are you happy with the purchase so far?