Maybe it would make more sense to have the sign duplicated. I've seen a number of things on ebay where the shipping charges kill the deal. Same thing on amazon. I can't see paying three bucks shipping on a four dollar book, when I can drive to Powell's and back for ten. What I find amazing are the people that jack up the shipping charges to make the item's price more attractive. When I was looking a LCD monitors some people were charging $150 shipping. I ended up buying it from Dell and paying $13 shipping.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk