Walmart offers the LEGO Ideas Women of NASA Building Kit for $19.99. Choose in-store pickup to avoid the $5.99 shipping fee. (Amazon charges the same with free Prime shipping, as does Target via pickup.) That's tied with our mention from two weeks ago as the lowest price we've seen. (It's the best deal now by $5.) It includes Nancy Grace Roman, Margaret Hamilton, Sally Ride, and Mae Jemison minifigures among displays representing the Hubble Space Telescope, Apollo Guidance Computer, and Space Shuttle Challenger.