I'm selling this because I haven't used it in a while. Purchased from an authorized retailer. Includes a serial number. There was a malfunction once, and I had it repaired by the manufacturer. However, I haven't used it since then, so I believe the contents are in good condition. I will ship the main unit only, without the box. If you would like the box, please add 500 yen and let me know in advance via comment.