Good is nebulous. Look up the old NRA grading system, New, Excellent, Very Going, Good, Fair Poor. Most today use a percentage of new condition rating. Good would be somewhere around 60-70% which would be somewhere around 375-450.
Price the new ones and that seems rediculous but it is what it is. I just bought a 95% 15 for $400 and it was fair. The "good" 19, if pinned and recessed plus tt, th, and big grips would be about the same.
You should buy every single gun you can find like that for those prices and bring them to Florida.
I look at guns every single day. That is not the norm reality here, nor is it on GunBroker. There are only a couple times here and there where you can occasionally steal one at those prices, but you have to be actively and perpetually on the hunt to snag them..
VarmintGuy would probably have some good information about buying out west. Like me, he is out there on the hunt everyday.
There were a bazillion 19's made. But, that doesn't mean they are being given away.
