I'm considering this vehicle from Carmax (yeah I'm sure you're cringing at the fact it's Carmax).

2010 Infiniti G37 Pictures and Photo Gallery at CarMax.com

It's a 2010 G37x Sedan for $23,600 with 38k miles. Navi and Bose Sound system included (Premium Package and Navigation Package?). It also includes the Splashguards and Infiniti Kick Plates. I really love the Silver exterior with Black interior. If it makes a difference, I live in Wichita, KS.

 

Seems like a pretty good price. Id say if they have it listed at 23,600 you could probably get them down some and make the deal even sweeter.
Good luck

 

Can't negotiate at carmax.

 

Carmax is waaaaay over priced
Your local infiniti dealers you could probably haggle your way down to a reasonable price.