How much will it cost to have this cake made at a bakers?

Http://www.newlaunches.com/archives/nikon_d700_camera_cake_looks_very_photogenic.php

The last cake at a bakery made was a 1/4 sheet cake for 20-25 ppl.was $30 up(one yr.ago). Go to Kroger/ Walmart $15 - $20, with inscription, very fresh and taste good.

$75-100 dollars at the bakery I work at which specializes in wedding cakes and sculpted cakes like this one. It all depends on how many people you intend to feed with it.
Since you did not say where you are from your best bet is to print off a photo of the cake and take it around to various bakers in your city. It is doubtful that a Walmart or any other grocery store bakery will tackle something like this though… At least in my area they would not.
Some might though.
Prices and skill set for cakes of ANY kind can vary widely depending on the skill of the bakery and what region of the country you are in.

That is going to take a specialty baker.