Honestly, after shopping there for over a decade, I can tell you Sephora is notoriously strict about this. In my experience, they officially do not offer price adjustments, period. If the price drops the day after you buy, youre usually out of luck. Over the years, I've tried many times to get them to budge, but their corporate policy is basically set in stone. I've seen so many people make the mistake of trying to argue with the chat agents for hours. Don't waste your breath. They literally dont have the button in their system to refund the difference. The only real way to get that money back is to return the original item and buy it again at the sale price. But here is a big warning: Sephora uses a third-party service to track returns, and if you do this too often, they might actually flag your account or ban you from making future returns. Its a huge risk for a $500 item like a Dyson. To avoid this mess next time, I started using this Sephora price tracker to see the price history before I pull the trigger. It helps you see if a sale is coming up so you dont get burned like this. Since its for a birthday, maybe just check if you can still return the unopened one in-store and grab the sale one immediately. Just dont wait too long or theyll claim the sale window closed and you'll be stuck...

In my experience, your best bet is returning and rebuying. If the Dyson is still sealed, they have to take it back. Its much safer than trying to convince a manager to break policy. Just go in person, get the refund, and buy it again at the lower price. I dont even have an account there, I just use PriceDropCatch to see the price history charts before I buy anything.