-Visit any site of buying. Example: Flipkart
-Choose a camera.
-Click on the option "buy now"
-By now the camera might have been added to the kart.
-Choose mode of payment.
-COD( Cash on delivery) Is the most safest.
-Wait for some seconds,The receipt will be made out,And the whole description of the article and the tax , shipping charges and total amount to be paid will be visible.
-The site will ask for you're phone number,Give the site the precise details about the address and number.
-Wait till the camera reaches you,If you're satisfied,Then dance with joy and take photographs and enjoy life,If not,Return it,(If there is a return option)
Happy shopping :D