How can I find out how long Sephora will have an item on sale?

Sephora has that new Marc Jacobs concealer on sale and a lipliner I want on sale. Problem is I'm broke until I get my stipend on the 20th. Wanna know why I'm broke? Because I keep putting things on my Klara and Afterpay accounts out of just really wanting them. I think Sephora should have to display how long a sale would be. At this point I wouldn't blame Klarna or Afterpay for contacting me and asking me to fully pay off my balance. Credit line on Afterpay is 1200 though from never having late payments. But they don't know I am someone that does get broke!