For-sale or not, Wizard Cyril got permission from Old Goff. Besides, Abel was an important friend of the family. He was not to be treated like the others.
And, the ballistas were just too normal of a gift. As strong as they were, they weren't the best kind of bows that the dwarves could offer. The best ones were the ones with rune patterns on them. Not only was a portal device installed right onto it (which could hold about 500 arrows in total), it could also shoot arrows out consecutively.
It worked with metal gears. When turned, three bowstrings would pull at once. Three giant armor-breaking arrows were shot at once. After the arrows were shot, the portal device would automatically attach the arrows in stock onto the bow. It was a giant machine gun designed to defend a fort.
