I had the clothes for at least five years ;)
I also agree with Kitchop. It's so little you can keep looking for something else. It will pad your resume and it will lessen the appearance of a big gap. The most compelling argument against it, really, is the "on your feet" one and I do think that's probably what it MOST comes down to. A little bit of money, a little big of 'out-of-the-house', a little bit of experience and another thing on the resume are all pros.
But also, if you DO need some new clothes, 65% is a huge discount (I had 50% that felt incredible) and that alone has some value.
ETA: I also agree with Chloe. I honestly am wracking my brain to remember one hardcore awful customer experience I had while working retail. I know at least one person was rude to me because I remember standing at the register THINKING "I don't know who you are mad at but it's not me" -- but I don't remember the interaction otherwise, which means she was not close to my worst customer service incidents (which are all in food service.) I think she wanted to return something without a receipt or something. Honestly, helping people shop for clothes is kinda fun. Most of them were cool. And I was working retail at Christmas.