Looks like a standard 75B with aftermarket grips (attractive) and the standard LPA adjustable sight, with a slightly different front sight -- both of which are available through CZ-USA. The sights could be after-market addons, or from the factory. (CZ uses LPA sights; my 85 Combat came with a slightly different LPA setup. I like the ones on the gun in the photo better than mine.)
Price may be a little high, so you may have some wiggle room. Nothing special about the gun and, I'd say, nothing to worry about. (I'd think $450-$475 would be fair, given its used, and CZ may not choose to honor the warranty.)
You can probably find a NEW one for about the same offered price ($550), equipped in about the same manner -- and have a no-issue warranty. The problem is that CZs tend to be rare, nowadays.