KAWAI Wooden Children's Grand Piano Mini Piano

Purchased new for my son's 2nd birthday or Christmas present when he turned 20. Some yellowing discoloration is visible on the keys (especially on the right side). All keys produce sound. The metal fitting for the prop rod when opening the lid is loose, but it seems repairable. The white string connecting the piano body to the lid has also broken.
Other than that, there are no major damages or wobbling. No box.
The price takes into account that shipping will cost at least 1200 yen.