I have designer taste on a secondhand budget (New York City rent, amiright?!). So even though I love luxurious things, I consider myself more of a deeply invested window shopper—at least until recently, when another editor introduced me to Cettire and effectively changed my life. So what is Cettire? Well, in short, it’s a place to find designer goods—bags, shoes, clothes, etc.—that are somehow (magically?) discounted. Of course, upon hearing this, my interest was very much piqued, but it seemed too good to be true. Could it really be that I, a self-certified budget shopper, could afford a sparkly little designer treat with just a few clicks on this under-the-radar website? I’ve seen too many fake Louis Vuitton bags on Canal Street to take it at face value, so I decided to do a little investigating. Here's what I found: Okay, So Here's How It Works Cettire is an online-only luxury fashion retailer that sells all your favorite designers (no, really, they have over 1,300 high-end brands to shop).…