let me tell the price of three coin account and how much caan i eearn by every post.
You could ask in the marketplace -> digital goods section and open a thread that says
"[WTB] Full Member account"
and you'll have people making offers. There isn't a fixed price. Hero Accounts went for almost 2 BTC last time I saw it, Full account may go for less than 0.5, probably something between 0.1 to 0.4 depending on the BTC price.