I just bought on for the wife last week at the LGS, $504. I am sure that I could have maybe saved a few bucks elsewhere, but this was in stock, and better than the prices I have been seeing elsewhere. A few dollars + - on the gun itself, I have found, is inconsequential compared to the amount of money spent on accessories and ammo over the life of the gun. The convenience of being able to hold it in hand before purchase, and walk out the door with it in hand are well worth the few extra dollars spent.
If I could find one in 9mm for under $500 I'd be interested. Seems every one I see is at $599 though and for that much I'll get the shield. I still keep looking though.