If anyone is in the market for a .45 acp Glock 21, Academy in Covington has a Gray frame Glock 21 for $540ish. That's better than most places I've seen, especially for a Gen 4 in general.
I asked them how they got it and they said they ordered a Gen 4 G21 and that's what showed up. If I had the extra cash I would have picked it up, but sometimes you can only catch so many fish in a single day.