Did you ask the customer why? It does seem odd, but maybe the customer has a very good reason. I had an international customer that never updated her address on PayPal when she moved several years ago. She ordered some items that came to over $50, but never received them and they never came back to me. Since it was her mistake she wanted me to redo the order and pay the regular price. I felt bad about it and kept offering to split the difference with her (due to my strong sense of right and wrong). Apparently I offended her strong sense of right and wrong and never heard from her again, even though I left a couple more convos.
What you could do is offer to sell the current items as the regular listed price, and then if the customer wants to re-order make the next ones a little fancier and at a little higher price. That way you both will feel good about it.
I would NOT sell the ones shown at any price higher than the one listed, as that could be considered unfair marketing practices and fraud. You can always raise your prices later when you edit or relist the items, but not during the initial transaction without upgrading the item.
