@streakmachine It's amazing isn't it? They're photographing their gear for selling and can't even be bothered to give it the most cursory wipe down. Even if I had a strangely high tolerance for other people's dead skin and sebum smears I would assume a computer owned by such a person was not treated well. As for blurrycam, I think sometimes it's incompetence and perhaps sometimes a ruse, ie. they think 'they won't notice the blemish if this photo is blurry'.
Did you ever see that episode of 'Top Gear' where they swabbed and lab tested the interiors of second-hand cars?