Today a #Yamaha CX5M #MSX computer with a Yamaha YK20 keyboard arrived. Bought from "Kleinanzeigen" for 200 Euros the system looks nealy new and works perfectly!
Sadly the sender used the original boxes as shipment packaging (with Gaffa tape)!
Next step will be to put the music software (https://www.sequencer.de/blog/yamaha-cx5m/4916) on one of my msx SD cartridges ...