good deal.. do you have size restrictions or do you want to get the most safe, with decent quality for your budget?
Off the top of my head.. Winchester, Bighorn, Cannon, and if you can up your budget 150-250 bucks you can get a liberty. At this price point you need not be concerned with steel thickness as most plated steel doors start in and around 1750-2k. What you can focus on is the size, the fire rating, and the amenities that come with the safe (outlet, door panel, etc.
When you narrow it down to one or two safes, dont discount the product reviews for insight to help you choose the best in your price range and needs.
Tractor Supply, Costco, and Lowe's Online site carry a combination of the brands listed above.