AKAI MPK225 Used Item - Body Only - Partially Defective MIDI Keyboard with Pads Manufacturer's Product Page: http://akai-pro.jp/mpk225/ This is a used item, body only. Upon inspection, the K8 knob is unresponsive. Also, turning the K7 knob slightly affects the K8 knob. I have confirmed that the rest of the functions work normally. In addition, some of the plastic parts had undergone hydrolysis (were sticky), so I removed the stickiness by spraying parts cleaner and polishing. Some of the keys are slightly yellowed (see images). I am not accepting price negotiations. I work on weekdays, so shipping procedures may be on weekends. Thank you for your understanding. Please contact me if you have any questions.