Amazon has the uni-ball Vision Elite Rollerball Pens, Micro Point (0.5mm), Black, 12 Count for $13.48. Add 2 to cart and the "Save $10 when you buy $25 of select items" will apply bringing the total down to $16.96 for 24 pens.
These are my go to pens and retail at around $30 per 12 pack!
https://www.amazon.com/gp/product…=UTF8