With orders of $25 or more, Amazon offers the Prang Thick Core Colored Pencil 50-Pack for $4.20 with free shipping. (Walmart has it for the same price via pickup, without the $25 padding.) That's $3 off and the best price we could find. (For further comparison however, most stores charge around $6 for a 24-pack of similar colored pencils.)

Note: This item is offered as part of Amazon's "add-on program" and can only be purchased with an order of $25 or more.