how do I find out the value of my china?

What have you done so far in finding out? Have you looked online for the pattern? Have you researched the pattern in books - the library has many types of books on antiques and collectibles. Have you had the set appraised by a professional appraiser?

You could post pictures of your china here, the Help Desk, and someone could help you better if they saw the pattern and you said what the marks on the china (on the bottoms of the plates, cups, etc).
Also, how did you come to have this set? Did you inherit it, buy it, or was it a present? How long have you had the set? Do you know any history of the set?

Sorry for all the questions, but the more information you can give, the better the answers you will receive.

Thank you.