Hi Bruno:
If you should be inundated with calls from potential buyers, I am willing to part with my recently acquired KMA at the same price as you've listed. It's a great little machine but will not meet my recording needs without additional investment and what I consider to be a steep learning curve. The manual leaves a great deal to be desired. As a songwriter, I don't have time to invest in learning a complex operating system when compared to the way most Yamaha Arrangers work.
I love the way this little machine sounds and the size is perfect. I don't mean to "horn in" on your thread but at least you know there are others willing to sell their KMA at a bargain basement price. (US Buyers Only and buyer would pay for shipping.)
Dave Rice