For me on Firefox 2 the drop-down menus at the top don't work so well. "Demo&Trade-In" works fine, but "Classifieds" comes down behind the left part of the banner at the top. I only see a slither of the drop-down menu's right side...
I'm with Shonver on the need for a LOCATION FIELD. If it can somehow be made obligatory, so much the better. Nobody wants to say where they are for some reason.