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Amazon [amazon.com] has 10-Ct BIC Cristal Xtra Smooth 1.0mm Medium Point Ballpoint Pens (Blue) for $0.97.
Shipping is free with Prime or on $35+ orders.

Walmart [walmart.com] has 10-Count BIC Cristal Xtra Smooth 1.0mm Medium Point Ballpoint Pens (various) on sale for $0.97. Shipping is free with Walmart+ (Free 30-Day Trial [walmart.com]) or orders $35 or more.