Thing is, you didn't state a clear case for making a change. You just complained that it was "unfair and mean spirited." It's neither of those things. It's perfectly fair, because the risk was clearly explained to you. You knew the risk and chose to take it. If you didn't like the risk, you cauld have chosen to not buy the building, then asked BB to change it, and bought it after they changed it if they chose to do so.
The mines you buy are fine just the way they are.