With purchases of $25 or more, Amazon offers Prime members the Bestway H2O Go Double Water Slide
with free shipping
. (Non-members can spend $35 or more to bag free shipping.) That's the lowest total price we could find by $11. This 18-foot slide features a launching and landing pad.
Note that these items are part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.