How much is my Charles M. Plum Furniture Company display cabinet from late 1800's worth?

I can only find one auction house that has sold a Charles M. Plum Furniture Company item and they did not know enough about then to help me. Charles M. Plum Furniture Company was in New York in the 1850's and moved to San Francisco in 1870's cannot find much on the internet. The cabinet has all original glass, shelves, even the key is original. The item has a tag on the back and was repaired at Charles M. Plum Furniture Company once. It looks like a Maybeck piece. How much is it worth and where can I auction it to highest bidder?