Here is an original 909 drum machine that I got and never invested the time to learn how to use. It has some cosmetic wear, nothing crazy but you can see from the pictures it is used and has what I think would be expected with age. I plugged it in and it turns on. All the buttons appear to light up fine. I plugged it into an amp with a 1/4" cable and a drum pattern came out. That said, I am no expert and am selling this as a used item with no warranties. I can guarantee that it turns on - beyond that I don't know enough to say if/what needs a cleaning or whatever. It comes with a power supply. Please ask questions if you have them and I will do my best.