Mailstation
I have one of these that is pre-hacked so all you do is enter the info for your dialin server. It has a fairly nice keyboard and B&W LCD screen. It's really not useful unless there's someone you want to have email. very rudimentary email. It might be useful for some sort of project. Yes it's that old.
It's free if you supply money for postage
http://www.linux-hacker.net/cgi-bin/UltraBoard/UltraBoard.pl?Action=ShowPost&Board=mswhatever&Post=10&Idle=0&Sort=0&Order=1&Page=0&Session
http://en.wikipedia.org/wiki/Cidco_MailStation
It's free if you supply money for postage
http://www.linux-hacker.net/cgi-bin/UltraBoard/UltraBoard.pl?Action=ShowPost&Board=mswhatever&Post=10&Idle=0&Sort=0&Order=1&Page=0&Session
http://en.wikipedia.org/wiki/Cidco_MailStation