"If secondary market tickets are cheap, that's really bad news for the city. The NCAA doesn't much care."
I'm not sure about that. Secondary market ticket prices typically don't impact the city one way or the other: they're mostly sold on stubhub or the uscho.com board or the ncaa ticket exchange, etc., and the transaction money never sees the city, no matter the price. The secondary prices on the street don't have much impact on the city, either.
On the other hand, people who spend less for their tickets may be inclined to spend more at the actual event, this making the lower prices in the secondary market good for the city.
In any case, the secondary market prices have been falling all week. Semi-final tickets that were $90 on Sunday are listing for $73 now, on stubhub. I'm guessing they will go lower still, maybe much lower.