LEGO Technic Mack Anthem 42078 Building Set! Just $129.99! Walmart Cyber Monday Sale! December 2, 2019 No Comments The Walmart Cyber Monday Sale is live! Hurry and grab the LEGO Technic Mack Anthem 42078 Building Set for just $129.99! This is the perfect addition to your holiday gift giving line-up. Be sure to select free in-store pickup to avoid shipping fees. Otherwise orders of $35 or more will ship free. Leave a Reply Cancel ReplyYou must be logged in to post a comment.