Why Do We Lust After Pottery Barn when Target Sells the Same Brands?

Recently, I was on a scavenger hunt for champagne glasses made from this Polish glass company. After running all throughout the mall and scouring the Internet, I finally find them in Pottery Barn. Finally! So I buy them only to find a week later the same ones were sold at Target for much cheaper. Why hadn't this occurred to me before? That's when it hit me, I reserve my Target adventures for things such as fun stationary, birthday cards, a picture frame, or even holiday decorations. So, Why do we lust after Pottery Barn when Target sells the same brands?