Purse that I covet

A girl I know has this purse. I saw it and loved it. It is the color that I want, with gold hardware that I love. She is fashionable and has lots of designer stuff, I was afraid that it would be expensive, until I snuck a peak at the buckle: BCBGirls. Hmmm... could be affordable! Found it at Zappos for $126 or bluefly for $77. Can I carry the same purse as my friend? I only see her every 3-4 months. She would never know, right?