Best prices on Green ink pens in Pens. Check out BizRate for great deals on Pens from Pilot, Pentel and BIC America. Use BizRate's latest online shopping features to compare prices for Green ink pens. Read product specifications, calculate tax and shipping charges, sort your results, and buy Office Supplies with confidence. Easily narrow your search and find the product that's perfect for you: Pilot G2 Gel Rollerball Pen - Green Ink, 12 Pk - Staples MINI Gel Stick Pens, Medium, Assorted, Dozen.