I have an Evolution MK-149 keyboard for sale. $45. All the dials and buttons and everything work just fine and it does a lot of things, especially if you are looking for more advanced sound control. It works like a regular keyboard too if that's all you want. It must run through an external sound system like a computer, receiver, amplifier etc We have MIDI to USB cable that we used with success and will be included if you want it call or text
or email