In addition to what was already said, I think there was no treasure left to reclaim in Gundabad, unlike Erebor. And although it's a sacred place, I don't think it was ever a big Dwarven kingdom.
Moria didn't have any treasure either by the time of LOTR, but such a massive kingdom/structure is a treasure by itself, even without decorative riches.
__________________
You passed from under darkened dome, you enter now the secret land. - Take me to Finrod's fabled home!... ~ Finrod: The Rock Opera
|