Amazon offers its AmazonBasics 1mm Ballpoint Pens 100-Pack, model no. AA919V-100CT, for $4.06. Order via Subscribe & Save to receive free shipping. At $0.04/pen, that's essentially tied with our mention from a month ago, $3 off list, and the lowest total price we've seen. It includes 50 black and 50 blue pens.

Be sure to cancel Subscribe & Save after your order ships to avoid being billed for subsequent shipments.