If you're looking for a Mossberg 500 and don't mind an AMERICAN MADE clone, I can help.
I'm currently cleaning up a Westernfield 500-- a clone of the Mossberg 500. (The barrel is an actual Mossberg barrel if that gives you a compatability idea.) Westernfield also made an 870 clone and a Browning Auto 5 clone.
Anyhow, once I'm done cleaning it up, $199.95 plus shipping to your FFL takes it home.