I just recently sold a pretty Mustache cup for just over $50.00 on Ebay, and Right now I have another on ebay, that is unique but has some damage, trying to find the value of the less then perfect ones now. I have a few more, that was kind of plain like the one you have, and trying to decide if I will post it or not. In very good condition with a saucer, they sell pretty well, not for big money, but some at least that is what I have been learning.