What's a good price for a Glock 19 Gen 4?
 

Are Glocks available usually with the different sights installed from the factory? Typically I see only the stock fixed Glock sights in the stores.

Anyway, what's a good price for a Glock 19 Gen 4? What are folks usually seeing out there?

Prices vary but here they are between $550 to $600 with fixed sights. Police officers can get them for around $400 if you know one who will buy one and decide later they don't like it and want to sell it to you.
I have found new 3G models for $500.

i got a nib in december from local gun shop owner's a master glock armor for 509 plus state fees . cabelas had gen4's for 549 plus fees

I've also seen Gen 4s on sale occasionally for $550 at the local Cabela's. I got my 23Gen4 last year for $530 at the local Impact Guns. They threw in a 30-day range pass which made it a good deal.

I see them locally for 550-600. As an LEO I'm fortunate to get them for not much over 400.

I also qualify for LEO pricing. Do most dealers offer special Glock LEO pricing or do you do an FFL transfer?

You have to find a dealer that has the LEO pricing set up, not all dealers have the program in place. You should be able to get letterhead signed by your chief and have it delivered directly to your department if you wish, this allows you to bypass the ffl transfer.

I just got one back in December from a local shop for $529. When I look at some of the bigger places (like Bass Pro) it's usually around $550 ish or slightly higher. Definitely check smaller shops if you've got them around you!