the d40 is like $600 to $800 depending on the lens, i dont know how much the d40x will be though, which is the same megs as the d200 but its not nearly as fast. the d80 is about a grand, the d200 is 1600 and the d300 is 1800.  there is a huge difference between the d40 and the d300.. u should probably read more before u buy ur cameras.