You might want to consider a professional appraisal. Many antiques dealers will appraise your furniture, usually for a fee to cover their mileage to come to your place and to compensate them for the value of their expertise. Look in the yellow pages under "antiques" or "appraisers". Make a few phone calls. Find someone you can work with. Be prepared to pay them fairly for their timeand expert opinion. You may have a valuable gem, but also remember that just because it is old does not mean it is valuable. Much depends upon condition and demand for the item. Good luck!!
To determine the value of an antique china cabinet, you need to examine your antique first. Look for the serial number or anything that will give you a clue. Next, you can visit some antique stores or large stores like eBay. Compare your cabinet to the ones they have and this will give you a rough estimate of your antique.