Gary,
I recently bought a 96C, and I had looked into finding a used one.
I think you'll find them pretty scarce.
A guy at one of the online stores told me they are so new that
they just aren't getting any used ones yet.
I finally just bought a new one. I think you'll find the price is
about the same everywhere...$699. So I tried to find a place
with cheap shipping, no sales tax (for my state) and a good return policy.
I can tell you that I'm very pleased with this unit for flying, I haven't
used it in a car yet.
Good Luck.
Greg