I got about 150 in stock at the moment, 1 dollar each, 120 dollars if u buy all, webmoney only. minimum order 10 dollars. PID: PIDs are used to get replacement products. You call the company, in this case Logitech, and say that your product broke. They ask for your PID, and your adress, and they will send you a new product. Logitech has products of over 200 dollars!