Dennis...

$500? That is what I'd call cheap too. Particularly if the time remaining
to overhaul is adequate, the service life remaining of life limited parts is
adequate, the hub is accompanied by a complete and authentic historical
record documenting all of the above, it is free of incidents or damage
requiring re-certification, and therefore also has a servicable (Yellow) tag
attached to it. That of course, would be signed off by an FAA certified and
authorized indvidual or entity qualified to make such a servicability
determination. By the way, I've got a couple of bridges for sale here in
N.Y.C. Are you interested?
Bob V.