Home Slickdeals Costco Members: LEGO Creator Medieval Castle 3-in-1 Building Set (31120) – $80... Slickdeals Costco Members: LEGO Creator Medieval Castle 3-in-1 Building Set (31120) – $80 + Free Shipping By ARCOM - 24 September 2021 59 0 SHARE Facebook Twitter Go to the deal page: Costco Members: LEGO Creator Medieval Castle 3-in-1 Building Set (31120) – $80 + Free Shipping