There are definitely some expensive Bluetooth adapters, but they're relatively few and far between, and usually offer an especially luxurious feature set and ...
I didn't really expect this to be a hard thing to find - I'd like to add Bluetooth to my desktop PC (X570, 3700X, etc.). I'm agnostic about wifi inclusion - it's happily plugged into the wall, which ...
I've come to a situation where I have a desk that is used by more than one mac (though never at the same time). The desk is set up with a nice USB-C/TB3 dock with stuff attached (audio, ethernet, ...