You can check the cost of the PPF directly from XPEL's website. If someone wants to buy the pre-cut kits they cost quite a bit.
$1k for the hood, $600 for the front bumpers, $400 for the rocker panels, $400 for the rear bumpers, $1000 for the doors, $600 for the trunk lid, $700 for the rear fenders, $150 for the luggage area, $150 for the pillars. Around $5k.
XPEL's website seems to also have rolls for sale. A sedan is about 300 square feet. XPEL Stealth seems to be going for $60 per 5 square feet. That's still at least $3k.