Heist at the Dragonslayers' Museum

From the introduction:

Recently, the "Dragonslayers' museum" opened in town. Three adventurers decided to kill some lesser dragons, stuff them, and expose them in a building, together with dragonslayer weapons, and various stuff. They just expose the cheapest items. In order to see the rarest pieces, the visitor must pay a high entrance fee. Visiting the museum can be a learning experience. There are books for sale (but few of them are really useful for an adventurer) and good human guides.