I have an old Selectric in the basement that doens't work properly. I occasionally think about sending it off for an overhaul. Still the best and fastest way to neatly address an envelope for a one-off letter.

I bet the people over on r/typewriters could point you in the right direction to fix it yourself if that's something that might be of interest to you.

How many people bring in broken typewriters that this would pay Manhattan rent? Do They sell or fix anything else?

They probably serve customers across the continental US.

They've moved down the street to a great new location and last time I was in there, a younger person was manning the desk (which I took as a good sign).