Try this 3ml Sample of Rohrer & Klingner Permanent Ink in colour Salix (Iron Gall Blue Black) for £0.65!
Please be aware that this is a permanent ink and will likely stain your fountain pen, and possibly your nibs too. I'd recommend to use it in a pen that you don't mind being discoloured, or with a calligraphy/dip pen.
I personally use this ink with a Bertonelli glass dip pen.
Postage is £1.20 per/8 samples..
For 1-8 samples please add "Postage" to one of your purchases, and "Pickup" to the rest.
For 9+ samples please add "Postage" to two of your purchases, and "Pickup" to the rest (total £2.40 postage).
There is no shopping basket function on the website, so you can either purchase each ink sample individually, or you can buy multiples if the ink samples are the same price. eg;
3 inks all priced at £1.10
Under an ink sample priced at £1.10 select "Number of units = 3"
"Postage" or "Pickup"
In the "Optional message" box type the name and colour of the three ink samples you're purchasing.
Please note that photos and monitors can't accurately portray the colour, shading, sheen or shimmer of an ink, and different papers can change an ink's colour and properties.