$50 is a good deal. There's a compartment that's integrated into the bed of the machine that holds feet and attachments. Check in there to see what comes with it. Feet are easy to find online if you need others.
I think it's one of the best Kenmores, with its 70s styling, clever clamshell case and really convenient as a portable. It uses class 15 bobbins with their big thread capacity, too.