my favorites: unusual and esoteric ink sites.

http://www.dealver.com/231.html

Hakase Fountain Pen Sepia Ink
made from real squid ink - how cool is that? lite or dark. tastes great! less filling! Dark: 7350 yen to usd: 70.6409 US Dollar.
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http://www.registrarsink.co.uk/registrars_ink.html

Registrars Ink

It is the Ink that is required for official documents such as Birth certificates, Death Certificates and on Clergy rolls.
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http://www.marcuslink.com/pens/ink/inksofnote/blue.html

blue ink sampler - glenn's pens
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http://www.paperinkarts.com/oldwor.html

Old World Ink - dip pen ink.
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http://www.thewritingdesk.co.uk/show...nt+Ink&cat=ink

De Atramentis Document Ink