Pens, Pens, and Lots of Pens

I have this habit of buying things that I find "cute and irresistible" when window shopping. So apart from my personal pen collection, I've managed to acquire several ball pens which I think of as "stock" for future swap partners at swap-bot who might like them. Take a look ...

The Monokuro Boo pens on the left have blue inks, the ones in the middle have blue inks and the ones on the right have black inks.