I still remember the thrill of unboxing my first pair of limited-edition sneakers bought through a spreadsheet. It sounds oddly technical, but for those deep in the fashion and streetwear game, the mulebuy spreadsheet is a secret weapon. Living in Austin, Texas — a city known more for live music than high fashion — I’ve had to rely on digital tools to stay ahead. I’m not a reseller; I’m a graphic designer who moonlights as a vintage curator, and my style is a messy mix of thrifted denim and high-end accessories. My budget is that of a disciplined middle-class creative: I can drop $200 on a single piece, but only…