Lime Green Clip+?!

I was under the impression that the Clip+ was only available in Black, white, blue, purple, and burgundy. Came across this gem on eBay and knew I had to have it:

After searching for the model number located on the bottom of the packaging (sdmx18r-004gl-a57), I was able to find a listing on amazon for it. Looks like it was a limited edition with only a few being made. If anyone has anymore information on this, or any other additional colors available, I would appreciate it!