Walmart offers the LEGO Marvel Super Heroes Avengers: Infinity War The Hulkbuster Smash-Up Building Kit for $18.48. Opt for in-store pickup to dodge the $5.99 shipping charge. That's $2 under our mention from last week and the lowest price we've seen. (It's the best deal now by $4.) Buy Now Tips Amazon matches this price. Features 4 minifigures and 375 pieces Model: 76104