For $30k, you should be able to get a very nice EB with little to no issues other than minor type stuff. I've seen rigs orginally listed for $50k-$60k plus sell for that, so just because asking prices tend to be quite high right now, selling prices really do vary a lot. With that price range though, I would definitely consider rigs anywhere in the country to give you some more options and wouldn't even consider buying one without seeing/driving it in person, preferably along with someone well versed in EB's and all of their inherent issues (and more importantly, how some cover them up to flip).
You could post up a "Wanted" ad in the classifieds here, and start checking out rigs local to you to get a better feel for what you're looking at and the questions to ask. Finding a solid rig for $15k-$20k would still give you many thousands of dollars to address even relatively major issues and make the rig more enjoyable for however you intend to use it, so that's probably what I would do, but to each his or her own.