Two things I would buy from VAs in a heartbeat:
STICKERS. And I already have, also planning to get more after this semester's finished as a lil gift to myself (I have a bunch of Obi's stickers saved on my wishlist aaaaaaa)
A book or a novel from them- I know a few of them mentioned in some past streams that they had a manuscript or a novel they were working on and that inspired some of their work. I don't know if they'll finish it or if the idea's been scrapped, but I would absolutely buy a copy if they ever published something. (books have been one of my true loves since childhood, it'd be a neat addition to my library XD)