I bought the only three baseball mystery boxes that my local walmart had.
From one of the Bowman Platimum I pulled a Steven Duggar serial numbered 187/250.
From the lone pack of 2008 Upper Deck X I pulled a Brian Bixler auto. I know it may not be worth much but it is always fun to pull an auto from a pack.
My one guarenteed hit a box were the following:
2014 Panini Prizm Perennial Draft Picks - Prizms Red White and Blue Pulsar #19 Jakson Reetz
2013 Topps Tribute Scott Diamond auto 93/99
2010 Topps National Chicle - Autographs #NCA-TS Tobi Stoner