Target offers the LEGO Creator Ocean Explorer Set, model no. 31045, for $9.99. (Amazon has it for the same with free shipping for Prime members.) Choose in-store pickup to avoid the $4 shipping fee. That's a buck under our February mention and the lowest price we've seen. (It's a current low by $1.) This 213-piece set includes instructions to build a ship with a movable crane, cargo plane, or large submarine.
Update: The price has increased at Target; however, Amazon still offers it for $9.99 with free shipping for Prime members.