Artify Art Supplies via Amazon offers the Artify Dual Tipped Twin Marker Pens 40-Pack for $22.99. Coupon code "O8F6L36B" cuts it to $20.00. Plus, Prime members receive free shipping. That's tied with our July mention and the lowest price we could find by $9. It includes 40 marker pens and a plastic carrying case. Deal ends October 1.