Used a few times at home, in the studio, and at live performances after purchasing it used. Operation has been confirmed. I generally can't respond to price negotiations, but if you write one, I'll use it as a reference if I decide to lower the price. Shipping is listed as 4-7 days, but I will ship as quickly as possible if I have a free moment. Instant purchase is OK even if there are comments. Please note that I may use recycled materials for shipping and packaging.