On eBay, you can find just about anything. Today, a prototype of the eMate 300, the first device Jonathan Ive worked on. The classic eMate 300 is indeed dark green (foreshadowing the iMac and iBook), and this model is transparent. According to the seller, Apple had planned red, orange, and purple models, but only the green one was released.
The eMate ran on the Newton OS (essentially a Newton with a keyboard) and had a long battery life thanks to its 480 x 320 pixel, 16-level grayscale display. The 25 MHz processor (an ARM, already) also contributed…