Amazon offers its Prime members the Sharpie Brush Tip Permanent Markers 12-Pack
in Black, model no. 1810705, for $10.63
with free shipping
. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.03.) That's the lowest total price we could find by $11. The tips of these markers allow you to control the width of your lines with the pressure of your hand.