Process of ordering products in Amazon.com

Hi,
I want to buy a digital camera. So I go to the Amazon site. But I can not get it. I don’t know why but I can not get it. They send me a message there always. But there is no way to deliver me the best. Can anyone tell me what the problem is? Why I am unable to get my product from amazon? What is the process to get the product?
Please send me your suggestion.
