Reading the threads about this product reminded me that my own one is sitting unused in a cupboard so it is now on Ebay.
The package includes the extended rail macro package plus the Arca mounting bracket, a RRS lever clamp and the nikon shutter cable. This is the USB version which works with Helicon remote and Zerene stacker. Looking for £375 excluding shipping (worldwide). I have 100% feedback going back 10 years on Ebay.
Full description here:
http://www.ebay.co.uk/itm/181272423981?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649