Mezco sent out word that their “Mystery Box” sale has returned for the Labor Day holiday weekend. There are two options available – a $5 box which holds product valued at $20 or more and a $20 box which holds product valued at $60 or more. You can find the $20 box here; and the $5 box here. Orders are limited to a total of 10 of each mystery box; which is quite a bit of mystery.