With orders of $25 or more, Amazon offers the Crayola Multicultural Washable Markers 8-Pack for $2.16. Plus, Prime members receive free shipping. (Non-members can spend $35 to qualify for free shipping.) That's the lowest total price we could find by $5.
Note that this item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.