If you tell us how exactly you plan to use your RV, we can give you an idea of what to look for. With RV's, it's HOW one plans to use it that determines 90% of the decisions made concerning purchasing an RV. Once you figure that out, then you can figure out what you need and if buying a new one is even financially possible.
So far, I am guessing you to be a good candidate perhaps for a class C or maybe a class A in the 25-30ft range. A barely used 30 foot class C (entry level style) can easily be found only a few years old and in fantastic shape, well within your budget.