Dave,
Cincinnati CL currently has two Troy Built tillers listed by a gent in up in Lebanon, Ohio.
I bought one of his rebuilt (1980 vintage as I recall) Troy Built tillers 3-4 years ago... very satisfied with the unit and his work.
The only issue I've found is that the Timken bearings on either end of the driveshaft were a bit loose and developed a "clunk."
I added shims to reset the bearing preload and all is well.
Mike