Welcome to the group Steve,
First, with your budget, I hope that you are very adept at repairs and restoration. At that price point, unless you are luckier than CA's most recent lottery winner, you won't find much in this geographic/price range.
That said, here in SoCal you need to watch every edition of Craigslist and findanyrv.com at least twice a day and be ready to go look, with deposit in hand, on about 5 minutes notice.
Our last purchases went just that way. In all cases we were the first to appear, about 2 hours after the ad appeard for a Scamp
in Downey, 6 hours after for a BigFoot
in Riverside and, while other interested buyers were still just talking, we sent a paypal deposit for a Hunter in Livermore on the first day of it's ad.
You might also want to go look at some that might be out of your price range just to get a feel for what they look like and what to look for. As small and simple as they appear, a hasty purchase can quickly turn into a money-pit. Unfortunately the winter price drop, while still there, isn't as great in SoCal as in, say, Duluth, MN.
Next big tip... Know all about how to identify sagging torsion axles, overage tires
and LP refrigerators, before you look.
BTW The term "We never used that", is usually sellers code for "It doesn't work".
In the SoCal market; You Snooze, You Looze