Sale: Friend or foe?

A bargain is something you can't use at a price you can't resist.-- Franklin P. Jones

So as I sit here reflecting on some of my recent purchases, I think about the joy that fills my body everytime I purchase an item on sale. So here's the issue, as a self proclaimed shopaholic, are sale's my friend or a foe? 

In my mind I'm buying these items because their on sale ( meaning they are cheaper than their regular price)Right?!?! So then why am I always caught buying more than I really need?Then feeling a deep sense of buyers remorse?

Here's the thing I have more than 50 pairs of shoes, a jewelry collection even Beyonce would be jealous of, and clothes to last me for years to come, but it seems like when it comes to a sale I just cannot refuse. So where do I draw the line between buying what I need at the time I need it? Or buying items for sale and then utilizing them later! 

There is just no winning.