Looking for insite

We are going to be selling out Panoscan and including with this is my Nikkor 16mm fisheye f2.8 manual, I can not seem to find a lot on the worth of the lens. Only one spot did I find it and they were asking 500.00 for the used one just like mine. Can anyone confirm this? Thank so much for any help!

Here is a link that you can look at how many of yours was produced. Value would be based on condition most of all but if more rare would influence also. The going prices I could find ranged from low of $300.00 to high of $600.00.
http://www.photosynthesis.co.nz/nikon/serialno.html#Fisheye here is the link you can check for info on your lens.

Fotojo

Check out KEH.com as well. There might be something similar for sale there that can give you some insight.

Thank you both of you! That really helped out a ton! Now to post it on ebay (UGGG) and craigslist. Wish there was a better place to post camera equipment besides both of these.