Hello. Go into E-bay Antique section_China. Or type in Antique China. There are heaps of sites, on the net. I check them out now and then.Your service will be worth something I'm sure. Good Luck!
Call an antique dealer or the show Antique Road show (they have a website) has antique dealers & they may be in your area or able to recommend a great resource for you.
So my husband is an antique on the west coast but just plain old on the east coast!!! I always thought it was 100 years. But we have a 35 year old car and it's considered an antique at least by dmv.