If you're solely interested in PIF juice swaps, get your five posts in on the new members section and go over into the PIF forum:
Pay It Forward - PIF As others have stated, if you want to buy/sell/trade outside PIF you'll need twenty posts (can be anywhere after those first five) and have to wait a few days or more on the verified member process. Takes about three to five days doing it via PayPal, the rest are apparently a longer process, but I don't have any experience with the others as I've got a verified PayPal account that I used.