I have the following for sale, or trade:
1 Newton Messagepad with stylus, manual, a CD (not the original) of Newton apps, the cable, and (perhaps) a European(?) power supply
(I can't be sure I can find it though).
2 Powerbook 140-170 series batteries, I think dead, but can be revived a bit with Battery Amnesia. . . as well as the stand alone charger and power adapter.
And I still have that SE PDS ethernet card (sonic) for sale as well.
Jake-- netjake_1 
yahoo (dot) com
If the Newton is a 2100 (not an upgrade 2000), then I might take it.
What is the price, either way?
--DDTM
It's the *original* Newton. Make me an offer + shipping; I'll also take a SE PDS coprocessor card, or anything numismatically related.
theres really NO difference between an upgraded 2000 and a true 2100. The only difference between the 2000 and the 2100 is the RAM amout.
CCC
...which, as far as I know, is not upgradeable, nor am I aware of a way to hack more on.
--DDTM