Amazon offers Prime members the Sakura 6-Piece Pigma Micron Ink Pen Set in Black, model no. 30062, for $6.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.59.) That's the lowest total price we could find by $2. It features 0.20mm, 0.25mm, 0.30mm, 0.35mm, 0.45mm and 0.50mm nibs.