OP, this is a company that purchases tableware, then resells it to people who are looking for replacement pieces.
http://www.replacements.com/misc/selltous.htm
I've never bought or sold with this company and I don't know how much they'd be willing to pay, but it might be worth looking into if you decide you want to unload your holiday dishes. At the very least, you might be able to help someone find that piece they've been looking for.