Walmart offers the LEGO Ideas The Big Bang Theory Building Kit, model no. 21302, for $45.46. (Amazon has it for the same price for Prime members; Target offers it for slightly more.) Opt for in-store pickup to avoid the $4.97 shipping fee. That's a buck under our mention from last week and the lowest price we've seen. (It's a current best by $15.) This 484-piece set features seven mini figures (including Penny, Raj, and Amy Farrah Fowler) and a variety of accessories.