I am takin it from Freshalloy, Coupes go up $250 and Sedans go up $200 as of 5/14/04. This is for 2004 models, NOT 2005. I think they suspect its from the cost of steel going up. Glad I picked mine up last month! 
2004 G35s 5AT DG/Graphite/Premium/Huper Optik Tint

2004 G35s 5AT DG/Graphite/Premium/Huper Optik Tint