Most Expensive, Least Expensive, Most Used Ink...

[Arkanabar]

The most expensive bottle I have is almost certainly the Iro Ku-Jaku (possible alternates are my wife's bottles of Herbin Emeraud de Chivor and Stormy Grey glitter inks). I suppose I could possibly count the $21 or so I spent on a 4.5oz bottle of Noodler's Borealis Black.

But I could also count Ku-Jaku as my cheapest ink, because it was given to me by my wife, gratis. I have several other inks that were PIFfed to me, as well -- I got them just for asking. Most of those have been paid forward since then.

I don't buy LE and out-of-production inks. One requirement for inclusion in the Six Seven Essential Inks is that the ink be readily available to me.

Most used is tricky. I suspect it may actually be Pelikan 4001 Brilliant Black, because I'm sure I went through at least one bottle of it in my lifetime, and possibly two. The same cannot be said of any of my other inks.