also please remember, that you are not allowed to sell elite*gold for real money (if you dont own the premium or elite*gold trader badge) as it is stated here:
3. Only members having an elite*gold Trader or Premium badge are allowed to exchange elite*gold for real money*.
*The term "real money" in this context refers to any transfer of actual currency, be it via PSC, Paypal or bank transfer etc. It does not apply to gift cards or virtual currencies that are bound to some service. Please note that non-compliance with this rule will result in a permanent ban.
The following examples may clear things up for you:
Nitrado balance: bound to a certain service (Nitrado), hence allowed
Amazon vouchers: bound to a certain service (Amazon), hence allowed
Prepaid cell phone balance: boune to a certain service (your cell phone carrier), hence allowed
PaySafeCards: universal payment method, hence forbidden
Bitcoins: universal payment method, hence forbidden
This list is not supposed to be complete, it only provides examples. Payment methods not listed here are not necessarily allowed. Ask a moderator, if you are unsure about a certain payment method!