Nice find! I've owned quite a few of those myself. Started out with a Palm Pilot Professional way back in 1997. This was my second year in high school and boy... did it come in handy! It had my day planner, games, notes, I read dozens of books on it... and tweaked it to do just about everything (Some of you old Palm users will remember Hackmaster!)

I also owned, and regrettably later sold, a IIIE, IIIC and M100.

I still have a handful of Palm OS devices lying around that I picked up second hand or new:

- BNIB IBM Workpad (basically the old Palm Pilot Pro)

- Sony Clie SL10 (very small, very light device with a high contrast green-screen)

- Sony Clie NX-73 (notable for the swivel screen & camera)

- Sony Clie TH-55 (still the best and most feature-specced Palm OS device ever made - WiFi, BT, camera, full touch screen. Basically the iPod Touch of its day)

- Palm Tungsten T2.