Found this while browsing around the site. Very cool! Not sure why one is more than the other though.
https://www.bhphotovideo.com/c/sear...t&ci=24039&N=3955685938+3955686100+3602808655
https://www.bhphotovideo.com/c/sear...t&ci=24039&N=3955685938+3955686100+3602808655