The first Nextuus Omnibus is a custom rebinding of the first three volumes of Nextuus (that’s 15 chapters plus 80+ pages of extra content made for the print versions). They were made to commemorate 10 years since the webcomic began.
The production run of these books was limited to 10 copies, and only a few remain.
Custom rebinding by Houchen Bindery: http://houchenbindery.com/
$75 plus $4 S&H
Shipped via USPS media mail.