I have been gaming since 1992 and building PCs since 2003. I enjoy Linux, supporting FOSS projects and am a tinfoil hat connoisseur. Gaming is my achilles heel in that regard.
Many FOSS projects rely on donations. If you have money to spare but don't know which to donate to take a look at the below links on Ko-fi, Github, and Open Collective. Anything on there is something I have found to be worthy.
I sell old hardware on Ebay. When selling systems I make every effort to use things like Trisquel; the Libre kernel; Ubuntu Touch; etc; to maximize privacy and user freedom.