This is your second mustachian crisis in four days. You need to buckle down and focus on growing your stache before we find a clippers and shave it off.
I know, I'm so embarrassed. This is on going even f I don't work in a store. I have reason to believe it's more than just a bad habit, like someone who binge eats all the time. They can't tell themselves to buckle down and expect it happen, I should probably take it somewhere else instead of crowding the forum, I'm sorry.
I think the forum is the perfect place to bring your concern about this! No one is scolding you for bringing it to the forum; I think they just want to be firm with you (which is, I think, what you are seeking from us). Better to bite the bullet and face your embarrassment in a public forum than to hide it, buy secretly, and regret it later.
I suspect you are sucked into the thrill of the deal! It is easy to fall for this. But you can resist.
+1 to G-dog. I'm guessing that you also enjoy the camaraderie with your work-friends, and get caught up in the excitement when they are preening and showing off their "amazing deals". But a cheap price for something you DON'T NEED is still money down the toilet. Take it from me, centwise, whose house is full of thousands of books that I acquired cheap (or free) and just "couldn't pass up". Even the free ones aren't worth the clutter they cause, most of the time.
Try this:
1. Go to the mirror and practice these responses: "Wow, that's beautiful! What a great deal for you! No, not this time. I don't need anything. No, really, I have enough dresses/ scarves/ shoes/ accessories. Maybe next time. But wow, you really did well!"
2. If you feel yourself weakening: Every time you see something that you feel you can't pass up, take the cash that you would have spent and put it in a special pocket in your purse. Think about the good feeling associated with accumulating money in that pocket instead of stuff in your closet. At the end of the day, see how much money you saved!
3. Even better: Leave ALL your cash, debit and credit cards at home during the days of the sale.
Good luck! Come back and post updates as you work your way through the ordeal. This could be a turning point for you.