This site aims to educate Iranian people about bitcoin and allow them to buy and sell the digital currency.
The trading of bitcoins on CoinAva is currently done through a company called Kenn Ava that is registered in Australia, which explains why Australian dollar to bitcoin exchange rates are listed along the top of the site.
It charges 4% on the sale and 6% on the purchase of bitcoins.
site link: http://www.coinava.com/
Choose carefully any service that store and manage funds for you. Very few Bitcoin businesses offer enough insurances to be used to store money securely like a bank at this point.