I spent 6mo looking. We started out looking at everything and ended up with AS, once you have seen the best, there is just no going back to the rest. Be patient. I recall a thread on this site about a gal up in Utah that was looking. She would post her latest find and got all kinds of good advice. I can't recall what she ended up with.
I found ours on an SOB lot with lots of Class A big $$$ rigs, somebody had traded up (down I am sure in this forums opinion) and there it sat on the lot since the clientele were all looking for monster coaches.
AS units pop up in the most unusual places, just keep your eyes open and your bankroll handy and a very nice unit will come your way. Check out the wbcci classifieds WBCCI.org
the classifieds on this website, and plenty of others. I used ebay as a pricing guideline but some of those folks have problems with what it means to be honest so take the descriptions with a healthy dose of skepticism on condition until you can see for yourself.