It's funny how many people complain about the prices of those grilles... And they always sell for that price. There's obviously a market for it.
People crack me up. At a bare minimum think of it as this: JDM only, one year only, 40yr old car, very rare, and the demand is high. Parts like that fetch a premium.
At one point those were decently cheap (compared to current value), but prices on those have risen far before Leno came on the scene. It seems the "Leno Effect" is the new "hipster." Everyone thinks that because its expensive it must be because Jay. There's a difference between a piece if crap 280zx or rusted out b210 and a very rare perfectly restored JDM grille.
Don't cry Leno because you're too poor to play the game.