For that kind of money, here's some ideas....
Does your area allow shotgun hunting for deer? If so, a combo pump gun like the Remington 870, the Mossberg 500,etc, with a slug barrel and a shot bbl would be good.
Otherwise,if your area has lots of waterfowlers, one of the bigger guns, like a 3 1/2" 12 ga auto would be a draw, if one can be found in your price range.
OTOH, to all the folks who have 12 gauges, but wouldn't mind having a light 20 ga, something like an 1100 Remington would be attractive.
HTH....