Humble Bundle with some terrain bits that would be useful
Had someone ask for some terrain STLs that would fit, and the post got taken down for low effort, so I'm sharing this Humble Bundle find. If you have not run across the Humble Bundle site, they sell digital goods (video games mostly, but some books and comic books, digital assets for video games, and every once in a while, a themed pack of STLs) at a good discount and part of the proceeds go to a charity. Pretty good deal for what they are.
Anyway, this Bundle, which expires in 16 days as I type this, has a selection of fantasy miniatures and gothic terrain that would fit well in a 40k game, all for $25. And to practice your painting, a bunch of texture pallettes. It's not all 40k applicable, but enough terrain and decorative bases that you won't feel ripped off (and you're supporting Make a Wish).
And if you're into printing for Age of Sigmar or Old World, you'll get more use out of this Bundle.