My Little Pony Equestria Girls Rainbow Rocks Doll Only $5.72 (Reg. $21.99!)December 17, 2014 by SMFM Leave a CommentCheck out this HOT deal on theÂ My Little Pony Equestria Girls Rainbow Rocks Doll down to only $5.72 (Regularly $21.99!). Plus, score FREE Super Saver Shipping on a purchase of $35 or more OR snag FREE 2-day shipping (no minimum!) with Amazon Prime.