something else you need to consider when i state location.
i live on one side of the continent. So take a look at where you live and you dont say, but look at the cost of sending something from where you live to each side of the continent if you arent on the ends. Then add in Hawaii and Alaska. Look at something like a rifle size and weight. If you have any of your rifle boxes, use those measurements. Or if you have a rifle case, use it. See what you get for shipping prices. look at the cheapest like ground and the 2 or 3 day air. See how much it costs to ship something.
i dont know about you and how you think, but im not in the mindset to loose alot of money on my sales. I dont mind < 20 bucks or so on all of my sales and i pay for FFL XFER since i use my FFL to ship guns via USPS. Also any GB add comes with a cost too and that is also not a money maker. But i see it as the cost of doing business on the web.
i totally get you not wanting to pay a dime more than you have to, but i think you are not looking at the big picture, but only your wallet and what you "think".