I have a newton 2100 that was given to me almost new (it had sat on a shelf in a hospital for 2.5 years, what could be more pristine than that). original 2100 not an upgrade. comes with extras. email me if interested, it's in excellent conditon, has the serial adapter for PC's, software, etc. look at planetnewton.com FAQ's for info.
i will also consider trades for things such as imacs (newtons go on ebay for around 400 dollars), and other such hardware (an old linux box maybe). buyer pays shipping.
i love this thing, but unfortunately my palm is small enough for my bag.