Users: The post you see above is a common online scam, in which you not only end up paying the scammer whatever price they ask, but you also hand them your paypal/alertpay/revolutionmoneyexchange (etc) info.
While online trading isn't within the scope of the purpose of this website, we're not going to discourage people from doing things that are not against the laws (i.e. things that are legal) of your respective countries. Just be aware of the possibility of being ripped off/scammed, and obviously do not make deals via sketchy means (Western Union, Moneygram, GreenDot cards, wire transfers, cashier checks, fraudulent web links, etc).