Vintage 1970's Gorham Cinderella Magnetic Dancing characters mysic box

Perfect working condition, includes figures of Cinderella and Prince Charming holding the glass slipper. When you wind the music box, they have magnets on the bottom of them and they dance around the base in front of the pumpkin carriage. (dated on the bottom, 1977) The song played is called “Shall we dance” . This is an extremely rare music box, I’ve only been able to find 5 other examples that have sold on eBay since 2012. ( I use Worthpoint for historical data . It shows the entire history of items sold on eBay, not just the last 90 days.)