Nikon USED gear pricing guide

What Should You Expect to Pay for used Nikon DSLRs, lenses and flash?

Check it out Here

Geavity - Create Gear list

What is Geavity? Why does the world need Geavity?

Geavity is the first social site focused on photography gears. Using Geavity, you can create gear profile, see what your friends are using, get and give recommendations for what to use and buy and even share your opinion on a gear with friends and the Geavity community.

Also they have a create widget to use in your Flickr profile or Blog.

Check them out Here