Reddit mentions of Tokyo Ghoul Illustrations: zakki

That all being said, as mentioned by /u/TotoroTheGreat, artbooks are actually a really good bet, and since your friend particularly enjoys the colorful art, an artbook would work very well for that, and they won't break your budget.

An example would be something like this, although obviously you should look for something for a series your friend enjoys.

If I had to suggest a completely blind gift, I would go for the Nausicaa of the Valley of the Wind box set, which can be found on Amazon for relatively cheap, at least in the US (although still a bit pricey, so it may not match your budget, especially if they live outside the US). It's a classic (the movie based on the manga is fairly well-known even in the West), and the translation and physical media of this release is very high quality.

If you liked this, please don't hesitate to show some love for the series by purchasing a copy of the Tokyo Ghoul [Illustrations] art book. I own both a Japanese and an English copy and it's certainly worth every penny. Not only does it come with interesting insight and commentary from Ishida Sui himself, the English version is printed on high quality paper that helps showcase every last bit of detail of the artwork and comes with a sturdy and gorgeous hardcover.

You can purchase them online or in-store through:


Barnes & Noble

Rightstuf

Kinokuniya

Amazon

>Product description

>A full-color art book showcasing the terrific and terrifying work of Sui Ishida, creator of the hit manga and anime Tokyo Ghoul.

>Tokyo Ghoul Illustrations: zakki features artwork and behind-the-scenes notes, commentary and ruminations from  Tokyo Ghoul creator Sui Ishida. Discover the creative process that brought the hit manga and anime to life, in gloriously ghoulish full color.