You can find them on Gunbroker for low $400's, add in shipping, FFL fee and you are at $450 to $480.
$500 out the door would not be the end of the world, no waiting is worth a few bucks.
What is your sales tax? 5%, 8%? Then your cost is creeping to $525, $540.
This is through Bud's Guns. $393 + $25 shipping + $30 FFL = $448 if you pay with a money order. $460 if pay with credit card.