This is what I'll do: I will ship for free in a plastic toploader which will be in an ordinary envelope. That will only require a stamp. I will pay for the stamp.
Thanks for being a fan! Well, now I've decided that shipping is free (see my reply to Xcardxcontestx above). I think I might have a second Dark Charizard 21/82 1st mint card to part with. (I'm keeping one.) I'll check to see if I have a second one when I get back to my house.