I have a machine like this. It is an early domestic rotary machine with a shuttle type bobbin. They were sold by Sears.
Cant remember where or how much I paid for mine. I dont use it because rotary machines do not run smoothly. The little round rubber wheels gets lop sided and causes lots of problems.
However, for collectiblity sake, it is an interesting little machine.
I wouldnt pay $25 for it.. maybe $5 or $10.