'grats. I had a PowerBook 170 as my first computer. It was the best laptop I have EVER used. I loved the keyboard and the fact that you didn't need the screen's backlight on to use it was lovely. Have fun with it!!!
Congratulations. By getting the colour 180c you will be spared the infamous 'tunnel-vision' deterioration of the display that occurs in the grey-scale 180. A fine acquisition.