Those are just a couple rifles, they get much more exotic and expensive.
Then, there's the necessary accessories. A scuba tank with regulator and fill hose will cost approx another $600 then you will need a scope.....
They're not for the faint of heart.
My Benjamin nitrogen-piston .22 cost a couple hundred bucks. It does the job.
Those PCP rifles cool. They’re also ‘way beyond me, but I’m glad I live in a world where they exist.