I no longer need the 850 interface. Recently replaced it with an ICD P:R:. It is in excellent condition and works perfectly. Comes with original power supply and the original manual that was hole punched so I placed it in a binder.
I received the 835 Modem in a lot I purchased a while ago and purchase the power supply separately to go with it. The unit powers on, but I am unable to do any further testing. No manual is included with the modem. Appears to be in great condition, but has yellowed slightly from age.
PM me if interested. Thank you...
$150 shipped (USA only) OBO