Do you not know what an SD card looks like? Would you like a photo stock picture of Las Vegas slowing the website loading speeds?
I wouldn't bring in the loading times here, after all we are in the high speed internet age not dialup. Having pictures that are properly resized would not make a noticeable difference on the page load for the majority of users.
Besides that, I agree that having pictures can be helpful for many cases, maybe not Los Vegas or SD cards, but many of the other deals I find myself clicking into Amazon just for the pic then again, perhaps that is your goal