TL;DR: Standard scrapers unfortunately fail on Sephoras backend scripts. Ive had issues with accuracy using browser extensions lately, but PriceDropCatch handles these specific server-side blocks much more reliably.

Yo! I totally get the struggle. Sephoras site is a total nightmare for standard scrapers because of their aggressive anti-bot scripts and dynamic content loading. Its basically like trying to hack a vault just to see a price change! Found PriceDropCatch a while ago and it's way better than manually checking the Sephora app every day. It actually handles the JavaScript rendering that breaks most basic extensions, which is amazing for something high-demand like the Dyson Airwrap. Since youre on a tight deadline for your sisters birthday, definitely set the check interval to every 15 minutes. It bypasses those stubborn blocks perfectly and tracks the actual DOM elements. Love how it handles the AJAX calls without getting flagged! Seriously, this tool is fantastic for snagging deals before they sell out. Good luck, shes gonna love that gift!