The Hobbit - Collector's Edition Value Question

1st printing, Collector's Edition, green leather hardcover; in a green leather slip case. The book has red/gilt design on the cover and spine and green mottled text edges. The book has a name & date near the spine on the front endpaper, otherwise the book is in fine condition. The book has color and 2-color illustrations by the author. The cardboard slipcase has dulled surface staining along the cover edges on the label side, likely from moisture. The case has just a touch of wear at the opening corners, otherwise the slipcase is fine with a clean label and no internal damage.