I’ve had this M1 for the last 25years but have not used it for a number of years. All keys work, its missing a knob on the master volume, and the number 6 doesn’t work (it hasn’t worked since I bought it). There are some minor scratches (see the photos) and I haven’t used it for some time so it now requires a new internal battery - these are the coin style battery, and a patch refresh for the original / factory sounds. 

This is a heavy keyboard, so it will need to be collected in person from the Cardiff.

The Korg M1 Workstation, a powerful keyboard synthesiser that offers 61 keys. This model is designed to provide incredible sound quality and sequencing capabilities to musicians and producers. With MIDI (DIN) input/output ports, it is easy to connect to other devices and create music in your own unique style. In addition, this synthesiser is packed with features including a built-in sequencer, making it perfect for creating tracks on the go. The Korg M1 Workstation is a must-have for anyone looking for a versatile and high-quality synthesiser that delivers incredible sound and functionality.