Comme des Garcons‘ Big Sale It’s 10 a.m. on Friday morning, and Mark Ghuneim, chief executive officer and founder of digital agency Wiredset, is second in line at the opening of Comme des Garçons’ New York Market Market, the four-day shopping festival of archival merch priced 70 percent off retail. With just minutes left before the doors swing open at The Cathedral on West 41st Street, he can’t stop gushing over his love for designer Rei Kawakubo. “I live and breathe Rei,” says Ghuneim, who paid an employee $100 to arrive four hours earlier, at 6. a.m., as a placeholder. “This is really the only fashion sample sale I’d ever…