Buy used, or save your money until you can get a good O/U instead of wasting it on a cheap one.
If you can't justify the cost of a quality O/U then buy a quality auto for a lot less. That is what I have done. I would like to own a quality double, either SXS or O/U, but have wasted a lot of money on cheap ones over the years. I don't shoot enough to justify the expense of a good one and have been disappointed with cheap ones.
I wanted a good dependable gun that would meet my needs and have used either Beretta or Benelli autos, bought used in the $600-$700 range. They meet my needs, and budget.