I have
the Maschine MK2 and the Akai Renaissance. They are both wonderful pieces of machinery/technology! However, there is learning curve attached to both. I imagine the reason you see so many of them for sale on Ebay is because people bought them and found out that without a lot of work and study they are totally useless. People sell them because they're incapable of operating them. Let me pose a question: do you think someone could learn to play a guitar, piano, saxophone, etc at virtuoso level in six months or a year? NO! And no one without any experience is going to learn to use these machines in six months or a year. Don't buy the Maschine for the drum sounds because there are many cheaper alternatives. Midi controllers and drum pads are dirt cheap. One alternative is Battery 4 by Native Instruments. I'm amazed that people with little or no musical background or training can think that they will be producing great beats in six months! But I like it when they do because it allows people like myself to buy the Maschine and Renaissance at a lot less than half of what they cost retail.