Antique China Cabinet with Wood Inlaid "Urn"

This piece was owned by my mother-in-law for at least 35 years.  I have had it in my home for the last 13.  It is a dark wood china cabinet with drawer and door.  There is a wood inlay of an urn on the front cabinet door and the legs are intricately carved.  There is additional carvings above and below the cabinet door.  It appears that the shelves lift and can be taken out (I have not).  There are no markings to indicate manufacturer or date of construction.  It is in good condition with a few scuffs and one knick.  A key is included.  

I would like a fair assessment of what it is worth and any possible history.  I am considering the sale of the cabinet and would like to know a reasonable price to ask/expect.  Thank you for any information you can give!