Price is not negotiable. Purchased on Amazon in January 2021 for ¥26,818, used for running until around 2023, and then stored at home. I am selling it because I was injured and can no longer run. Functionality confirmed on 2025.5.6. The outer box in the photos is not included, but if you would like it, I can include it for an additional ¥800 for shipping, so please let me know. Due to the high number of comments from people who are just browsing, I will not respond to those who I believe are not serious about buying, so please understand.