Okay, we get it — San Francisco is goddamned expensive. Of course, you could always stop complaining and start selling your used panties online. It appears some female college students have learned the basics of running a business without ever having to take a business course. Go to Craigslist and you will find plenty of young women auctioning off their already-worn undies to help pay their way through school. Believe it or not, it's a working business model. And here you were worried that San Francisco was losing its grit.