Marketplace SubForum based on region?

First off I would like to say that i love the site. Very helpful and the people on here are amazing.

I was browsing through the 2005-2009 Member Classifieds and have a suggestion. I know when posting and item/s for sale we must provide the location on the thread title. I was thinking about making a couple subforums in the classifieds based off of the Region (Ex: Northern California, Tri-State, South Central, Mid Atlantic, Mountain West, etc).

Hope this is a good idea.