I still remember the day I stumbled upon a spreadsheet that would change the way I shop for designer goods. It was a rainy afternoon in Portland, and I was scrolling through Reddit when I found a link to a mulebuy spreadsheet. As a vintage streetwear curator, I’m always hunting for rare pieces without breaking the bank. That spreadsheet was my gateway. Let’s rewind a bit. I’m Leo, a 28-year-old menswear buyer living in Portland, Oregon. My style? Think thrifted Carhartt jackets mixed with Japanese denim—elevated basics with a story. I’m not a millionaire collector, but I have a sharp eye for value. The problem? US prices for brands like…