It's a later model.... nothing "collectible". So I'd say no, your not "obligated". Now if it was one of the old IH ones for $50, you bet you butt you should!
38" so it's small. Not in great condition, stored outside..... $50 is pushing it pretty hard. Can't see if the brooms are good. I bought a sweeper a couple years ago in better shape, 42" for less.