I don’t really use steam and I have this problem too. I buy discs used, and I don’t always look up gameplay videos.. so yeah, often not my cup of tea turns out. But resellable if I want down the line, at least.
Just the other day I bought a Wii super monkeyball game that uses the balance board. I have everything I need to play it, but the chances of actually doing that are pretty slim, tbh. A lot of the older games (anything under $10 for consoles more than a decade old, really) I buy are like that. “Might be fun, might never get played, but in an emergency, can be sold”.
I miss playing mmos, but none of them have hit like vanilla wow on a pve server, and now I hate people too much to bother. If I could spin up a server of my own and just play by myself or with a few people I know, sure, but most games don’t allow that. So single player it is.