My party has managed to offend a silver dragon, but not to the point where it decided to attack us. As part of an attempt to make amends, my character is creating a magical painting depicting famous good-aligned dragons in moments of great heroism. Each day it slowly shows a whole scene developing and changing, and then switches to the next picture the following day. It can also be shifted to a specific painting on command. The full descriptions of the painting as follows:
The second painting shows the venerable bronze dragon known as He Fa Chu (not his draconic name), presiding at the Monastery of Shung Li in the distant land of Dtang Ma. Over the course of the day, it shows him mediating disputes between the local kami and kitsune; training generations of monks; and assembling a staggeringly impressive library.
The third painting shows Merithyl, the copper dragon renowned for her tireless opposition to slavery, in battle against a ship of slavers over a broad, calm ocean. Over the course of the day, the slavers fight fiercely against her. She is grievously wounded, and in the end chooses nobly to sacrifice herself to destroy the ship at the cost of her own life.
The fourth shows Gunnarex, the sage golden dragon, who composed the Draconic Apsu, an epic poem recording the origins of the true draconic races. The painting shows him reciting the history of the draconic kinds, each in kind, over the course of a day.
The fifth and final painting depicts the heroic silver dragon Terendelev in the defense of the city of Kenabres. Behind her stands a Wardstone at the edge of the city. Over the course of the day, all of her allies fall, and the corpses of slain demons pile up about the base of the hill, until finally Terendelev stands alone, bloodied, but unwavering in her determination to fend off the attackers. At the last, Terendelev fights the Balor Lord Korramzedeh in single combat. The fight is brutal; neither one holds back, and both take grievous wounds. But in the end, Terendelev defeats the demon, almost slaying him, but definitively breaking the assault and sending the balor fleeing for its life. Unable to pursue him, Terendelev nonetheless stands battered but triumphant before the walls of her protectorate.
I've taken Craft Wondrous Item just so I can make this thing, and now I'm trying to figure out how much it should cost. I haven't found any very good analogous items. Suggestions? I'm guessing it should be at least 2,000 gp market price, possibly much more.