Those looking for a sub2000 need to befriend riverofguns.com. It is a site aggregation tool and works great. Set up a search for the rifle and add it as a link on your favorites bar. Every time you sit in front of your computer, do a search. You will find one.
You might also cruise the Sub 2000 Availability thread and the Prices by Region thread stickied top of page. They are both updated fairly regularly, and we encourage folks to post up where they are finding them.
check your local gun shows. I just went today to the one in Orlando, FL and there was a 9mm and a 40 cal. They were listed around $380 to $400. When I was looking for mine I couldn't find them at all. I ended up finding an used one at the pawn shop. I ended up paying $380 for it. It was in great shape. It only needed a new extractor. I don't regret it.