Walmart offers the LEGO Ideas The Big Bang Theory Building Kit, model no. 21302, for $39.63. (Amazon has it for the same price with free shipping for Prime members.) Opt for in-store pickup to avoid the $4.97 shipping fee. (You can also pad your order over $50 for free shipping.) That's $6 under our mention from last month, the best deal now by $20, and the lowest price we've seen. This 484-piece set features seven mini figures (including Penny, Raj, and Amy Farrah Fowler) and a variety of accessories.