Good sugestions so far guys.
Welcome aboard Eric! When you some extra time, stop by the introductions thread and let us know a little more about you.
Now, an answer to your post. Check around for a used double or over under at the smaller gun shops in your area. I have a Stevens Springfield that I picked up for $400 at the archery shop my wife and I frequent about a year ago. The only work I have into It is a replacement butt pad (about $20) and a good cleaning. My step daughter and I both use it for trap and skeet and I use it for phesant during most of my hunts. BTW, she is averaging 24\25 in her trap league. It's the shooter, not the shotgun.
Another good option that is well within your price range is one of the old Mossberg bolt actions. My 185d and ka 20 gauges, and my Kessler 30c 12 gauge are pretty much the most versitile shotguns I own. I can shoot trap in the morning, go afield in the afternoon, twist the choke to a new setting, and hunt anything from duck to deer with the same gun. Brooklyn fats and blueguns also sugested some great options as well. Check out a few and go with what suits your needs best. Good luck and enjoy.
If I have to explain why I ride, you wouldn't understand. Explaining sex to an alien would be easier than explaining the feeling, one that boils all that is going on in your life down to what really matters each time you are in The Wind. All I can say is, Life is not Life without it.