Pentel R.S.V.P. Ballpoint Pen, Fine Line, Black Ink, 2 Pack (BK90BP2A) : Ballpoint Stick Pens : Office Products $0.96

Amazon has the 2-Pack Pentel R.S.V.P. Fine Line Ballpoint Pen (Black Ink) for $0.96 with free shipping on $25+ or with Prime (extra 5% off with 5+ items S&S order).
https://www.amazon.com/dp/B002YM4WME