Sgt Pepper,
$450 sounds about right for the Houston area. Almost a year ago, I was shopping for a SIG 239. At that time, Carters Country wanted $525 (regular price). I ended up buying one at a gun show (from Doc Walthers) for $425 NIB (of course, that was a year ago). Carters Countrys "regular" prices on most guns are ridiculously high; however, their weekly sales prices are much more competitive.
By the way, if you don't like the factory grips on the P239, Hogue makes a very nice finger groove style (fits my hand just right).