Craigslist and eBay are great networks to sell, trade and meet like-minded people. eBay is a great way to see how much pairs are going for so you can set a realistic price, and it's also a place where people can come-up on auctions that others aren't following. Ask any devoted head, they'll spin yarns about all the Jordans and O.G. Air Maxes that they scored for under $100.