When you see photos of items and the listing says "stock photo" , this may be because they used somebody elses photo. This is a great idea wether or not you have a camera. It saves loads of time if you have multiple items to sell :- say ten hard drives or six wooly jumpers.
So... go to search.. type a brief few words about your subject, Hard drive or jumper, jersey. You could be more specific by saying 10 or 20 gb hard drive, or nylon zip up jersey.
press search, look at the results. when you find your item click to view. Right click on the title , body of text, and the photo. Each one in turn. Save them with a suitable title, :- 10gb hard drive.
When you come to listing just copy and paste.!