1. You please pay for our basic cost of samples making. The first time was free. But from last time(Apr. 2015), you need to pay $300 every time. This is our basic cost, as soon as our equipments start for your non-standard samples, it means at least 30 pcs loss. Or you can buy 30 pcs samples every time, we make 30 pcs for your check. That's $363.3 totally every time.