With orders of $25 or more, Amazon offers Prime members the Crayola Kids' Washable Neon Paint 10-Count Pack, model no. 54-2390, for $4.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping.) That's the lowest price we could find by $1. This pack contains 10 2-oz. bottles of neon paint.
Note that this item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.