The only dumb question was the one that wasn't asked . Get an agreement on whether the seller will take the gun back if the buyer is not happy with the condition of the gun. Determine how much time the buyer has to make a decision about the return. Decide the method of payment. There are multiple options, but let's consider three.
Buyer sends funds to seller first .
If a personal check is given, the seller may delay shipment until the check clears. Gun can be shipped COD . Buyer needs to know what that will cost and how that affects the final purchase cost. We will provide third party brokering . Even if the seller verbally agrees to a return policy, there is no guarantee that it will be honored.