I just got a black on black ES 350 with everything except the Panoramic sunroof and the Mark Levinson sound system for $400 over invoice. And I traded in a leased 2004 Camry for $1500 more than the lease payoff amount, so I think I did OK. Loving it so far.
As for detailing, I've heard good things about Zaino Brothers products in a Vette forum. So, I bought the Zaino Ultimate Protection Show Car Kit and will try it out this weekend if it doesn't rain.