I have a used good running Little Beaver 8 HP Post Hole Digger motor runs good needs little TLC like kill switches fixed.
comes with 8" drill bit. $400 o.b.o.
https://littlebeaverstore.com/store/little-beaver-8-hp-post-hole-digger-b-s-20-1-mdl-8b2.html
make / manufacturer: little beaver