I don't know the difference between the 986 and the 989, but I have had a
989 for over fifteen years. It tunes everything imaginable, and some things
unimaginable. It has two coax antenna, a dummy load, and a longwire and
ballenced output options. I do take the top off once a year to clean the
wheel assembly for the roller inductor. You can knock the roller off the
end of the coil, but that is an easy fix. If you are cranking the roller to
fast, that can happen.
I would look for a used one I think, they are around.