Check at the gun shows and in Shotgun News for police trade-ins. There are usually some S&W J frames, some with concealed hammers, some with exposed hammers. There are also usually some Model 10's with 2" barrels that are a bit thicker, but hold 6 rounds. These guns almost always sell within your price range, and will (IMHO) be superior to the Taurus, Charter, and other inexpensive revolvers, even if new.
Jim