"Jet" is a very popular "home size" unit.
I've seen some old Craftsman (yes, from Sears) units floating around, too. I agree, check with a "used machine" supply house. Another option is to look in the Dayton, Ohio area, as that's been termed a "Mecca for used machinery".
Get at least an 8" chuck. If you can find one that's NOT "3-phase", it will be easier to install at home. "Phase converters" are available, but a bit pricy...