I think it would depend on your relationship with the gun shop. If they have always dealt fairly with you, then dealing for a used gun on their front doorstep is definitely showing a lack of respect for their business. It you were going to the gun shop to laugh at their prices (Don's Guns maybe?) and the folks inside have always been a prick to you and other customers, then I would not have a problem making the deal within an inch of the door.
I rarely frequent gun shops that are staffed by morons and try to be loyal to those that have treated me right.
I rarely frequent gun shops that are staffed by morons and try to be loyal to those that have treated me right.