Sharpie Pro King Size Permanent Markers, Chisel Tip, Black (12-Pack) for $7.49. Shipping is free on orders over $25. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for reference. At the time of this post, it has received an overall rating of 4.6 out of 5.0 stars. Most places have it for about $23.