I have a Mamiya wireless remote that I used for one project and simply don't need it any more. It is in perfect shape and includes the box. They're $500 new at B&H, this is it: http://www.bhphotovideo.com/c/product/182458-REG/Mamiya_211_752_Remote_Control_Set_RS402.html
Lowered, $300 shipped US
PM me if interested
Lowered, $300 shipped US
PM me if interested