With orders of $25 or more, Amazon offers Prime members the OurPets A Peeling Catnip Banana Cat Toy, model no. 1050011639, for $3.59 with free shipping. (Non-members can spend $49 to bag free shipping.) That's the lowest total price we could find by $4. It's filled with 100% North American grown catnip.

Note that this item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.