What are the Standard/Safe methods of Payment for EE?

Sorry if this is posted somewhere, I didnt see it.

I have never sold anything online, and would like to sell an upper on the EE.

What are the common payment methods to make sure we both get what we want?

I assume the seller waits for payment to clear before sending merchandise, correct?
So the buyer is the one trusting the seller to be reputable?

Thanks in advance