Do you mean product pictures from the site?
You can either place a link on a line by itself and it will create a preview of the page for you with a picture, e.g.
Or if you want a number of pictures placed where you like you can copy them from the page and paste into your reply (in some browsers - not mine) or dowload the photo from the page and upload it using the normal upload picture button:
Then you can create something like this:
Is this what you were after?
You can turn the images into direct links if you like but that gets a bit more complicated.
There are lots of technical know how tricks in Bonus Formatting and anything you want to try feel free to test it out in The Sandbox 
.