Amazon offers Prime members the Fisher-Price Octonauts Gup C Playset for $5.04 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.30.) That's the lowest total price we could find by $17. It includes a Shellington figure and whale.
Need it by Christmas? Orders placed via Prime by December 22 are guaranteed for Christmas delivery. Otherwise, place your order by December 19 via standard shipping.