I currently have 3 units, all are regular NGPC's:
A silver unit that I got back in the day, it's in terrible shape but has a GBA front light mod. I didn't do a good job of removing the light from the GBA so it has scratches and stuff in the light screen.
A Anthracite (carbon fiber looking color) that I bought new from a website a couple of years back since I lost my other good NGPC moving back in 2004 or so. Barely used, I keep it in a case so it's perfect.
And... a month or so back my wife was digging through boxes and found the lost newish silver system! I had bought it new back in 2002 and only played it once to test it. It was packed in a small box and forgotten.
I want to get a camo blue one. I generally don't like camo, but something about that color looks good to me. And I really need a light, I can't play the system at home since my lighting is too dim.