You will write on the description: "I understand that this is a payment for virtual items what does not require a physical delivery. I agree that it is non-refundable transaction. I promise do not to charge back the money. My Steam profile: (write here your Steam profile URL)."
It's quite hard and actually near impossible to agree to those terms you set out in the description when you've only got 5 positive reps. I would like to trade with you but I will not go first.
15 CS:GO Keys
1.80$ each
Feel free to add me.