Walmart offers the LEGO Marvel Super Heroes Avengers: Infinity War The Hulkbuster Smash-Up Building Kit for $19.99. Opt for in-store pickup to dodge the $5.99 shipping charge. That's $4 under our January mention and the lowest price we've seen. (It's the best deal now by $4.) Buy Now Features 4 minifigures and 375 pieces Model: 76104