Hello from Calgary!
The females are $2300 each, correct? Having registered pups isn't the be all, end all. All it means is that the breeder submitted some paperwork to the CKC. I had a registered purebred dog that we ended up having to put down at 4 yrs old because she had so many health problems. Believe it or not, the CKC allows line breeding (aka inbreeding), so having a registered dog doesn't automatically mean you'll have less health issues. It can even be the opposite.
Are the parents registered? If so, ask to see a copy of their paperwork. I was in the same boat as you in that we purchased our Frenchies from a breeder in SK, so there was no way for me to go to the home, see the pups, see the parents, etc. I asked a lot of questions, asked to see whatever paperwork they had on hand, made *sure* (as much as I could) that the parents were out-crossed (meaning THEY weren't inbred themselves, and then passing problems along to puppies), made sure there was a health guarantee, asked to see photos, etc.
Again, even with the breeder in Calgary that we got our pug from, we went to her house, saw where they grew up, saw the parents, saw the paperwork, etc., etc., and still wound up with a very problematic puppy. You can ask all of the questions you want, but make sure they're a) the right questions, and b) keep a record of all of the emails that go back and forth.
That being said, the pups are gorgeous! They look like Frenchies to me! Even within the breed you see a lot of variation. Some are more block-headed, some very stocky builds, some slim, some more dome-headed, some wrinkly-faced, some not as much, etc.
$2300 is a 'normal' price to pay for that color. Blues are uber expensive ($4000+ up), but between $2000-3000 is normal.
Is the breeder registered with the CKC? (Ours wasn't) Do they have a website? Do they keep in touch with owners that they've previously sold puppies to?