[DonDavis]

Initially, I emailed them for a quote. I took very accurate measurements and it was 504.3 sq ft., but I forgot the fireplace hearth and surrounding area, so I bumped it up to 550. I was expecting it to be very expensive.

Their reply was surprising.
$1.15 psf Clean, buff to satin, apply penetrating sealer
$1.25 psf Clean, buff to light polish, apply penetrating sealer
$1.50 psf, Clean, buff to high polish, apply penetrating sealer.

They have a minimum charge per job of $750. Wow. This is looking very promising.
The next step was to request an on-site estimate, which I did.
For Satin would be $1k, for low polish $1100.
They say it should only take 1 long day to complete the job.
There's a lot of pits, the crack, and existing sealer to remove. Seems like a decent price to me.

Fairly certain I'm going to pull the trigger on this.