How much does a space probe cost?

I really need to know how much a probe costs to make and how much one costs to send out. I am having trouble finding the answer by myself. PLEASE PLEASE PLEASE tell me the website you got them from. Thanks people:)|||The problem is that the cost depends upon a huge number of factors: What kind of scientific equipment is needed on the probe? What type of resources (facilities, manpower, etc). do you need to build it? And the list goes on. Probes can be in the millions or billions of dollars.|||Some cost "only" hundreds of millions, while some cost more than a Billion dollars. Launch costs have been around $100 million or more, but now SpaceX will do it for less than $60 million. A lot less if the size is small enough for the Falcon 1.