Michele - first you can sell them your not a demo and I don't think it matters that much. But your right not in the catty means you can sell used no worries. I can only say in the past I have sold older version ink pads I sold all for 1/2 of original cost with inker and marker. I may not have written that clear inker and marker at half of their price and pad for half of it's price added together, When I ebay'd a would put a "bonus" of some matching cardstock if I had it. Just 5 sheets.
Proud Navy Aunt