I get irritated when I see alarmist articles.. "DONT BUY THAT USED!! GROSS PEOPLE'S FEET WERE IN THOSE!" I can almost understand not wanting to spread bed bugs on mattresses, but a proper bed-bug cover and sanitation process would quickly fix any problems you were worried about.
I've bought almost everything on this list used, or got it for free and used it. I think make up would be the exception. How many of these have you bought used, or do you feel you agree with the article?
Pet food and treats