Quoted from cottonm4:... How much would you pay to ship your favorite pin across the country? ...
$0 - I've been doing this for a long time and I have never bought or sold with shipping. Cash and carry. See it and accept it I don't want to hear shit afterwards. Just like I buy. We made a deal and if it looks like what was expected there should be nothing afterwards except "Thank you, what a great transaction".
If you are in the hobby for the long haul it will come up eventually.