Oversized "Chinoiserie" China Cabinet

I recently bought a massive “Chinoiserie” China Cabinet.  It measures 120 inches long X 86 inches tall and is 18 inches deep in the center section, stepping down to 15 inch deep and lastly, 12 inches deep.  It separates into 3 sections each 40 inches wide by 86 inches tall.  The bottom and sides are painted with floral and country scenes.  The gilt painting detail is very finely rendered. The top ¾’s is of the piece has beveled glass with a total of 48 panes; the interior back ground is burgundy color.  The piece is in excellent condition and there is virtually no damage on the piece (there is one small repair to the gilding and some wear beneath the cabinet pulls in one area.)  Previous owner states that his mother was an interior designer and purchased the piece wholesale in the 1980's for $9,000 at the Chicago Merchandise Mart.   I know of only one other in existence that is owned by a friend.  She is the original owner and purchased it in 1970 at W. & J. Sloane, Beverly Hills, CA for the price of $4,700.  Hers has a gold back ground and she states that the choice of the back ground color was an option offered by the manufacturer.