Request for auction catagories

Hello to all and thanks for reading this post.
We have developed a new collectors only auction site. We are requesting all
stamp collectors go to the site and check out our stamp catagory. What we
are trying to find out is what catagories we should add? We want to make
sure we have the appropriate catagories for our members but we also desire
to keep catagories much more simplified than Ebay.
Thanks for your help.
And feel free to sign up.

Thanks
Team KidThrifty
www.kidthrifty.com