We're always trying to negotiate to get what few MX Green, Grey, White, Clear, etc. keyboards exist. Typically, the 10 - 20 that we are able to get are the ONLY inventory a given manufacturer has.
Re: Hard to look through 100 keyboards
I'm working on developing a ton of new features for the site - one of which will address this (part of why I haven't been on GH in forever - also Facebook seems to be the 'goto' update venue lately - I feel like a traitor, sorry)
We simply lack the manpower required to do everything we want to do - e.g. further develop site features, add content, add keyboards, add accessories, etc. etc.
This being said, I would like to reach out to the Geekhack community for help. I'm going to start a new thread and see if anyone's interested.
Edit:
http://geekhack.org/index.php?topic=39541.0