But RAM prices went to the moon, so I instead opted to repair the desktop. (It's only ~15 years old.) It's alive, again, and performs well enough.
The HDD in it is pretty old (not as old as the rest of it, it's on its second drive; 15 years would be quite impressive!), and still works for now, but there too, prices are silly and well above inflation. (I looked it up again: the same HDD is 50% more expensive today than when I bought it, in real, accounting-for-inflation dollars.)