If it were a Mordhiem-like city I'd buy it in a heartbeat.
Build it back up, clean out the mosters, Angst in a hopeless home, sword point conversions, kick the door combat, tear it all down to start over, loot the remains and many other campaign styles can be done in the City of the damned as an RPG setting.
Notably if it had high to mid level NPCs statted out as if they lived in a warzone. If I am investing 100 bones in a city book, I want every NPC to at least competent enough to have a chance of earning thier CR.