I’ve been writing with fountain pens since 2015. When I started, I could not imagine paying more than $25 for a pen. Nor could I imagine owning more than two or three. My favorite was a blue Lamy Safari with a fine nib that I used every day. I ran through about three ink cartridges per week. Today, I own more than 100 pens each of which ranges in cost from $25 to $800. I rarely use cartridges...