So many people are obsessed with cosmetics of the lenses that sometimes they take 45 minutes looking and re-looking at a lens that they are buying. I know this because I sell my share of stuff on Craigslisst. Sometimes I am tempted to say it in my post, that if you have a near disease-like requirement on cosmetics and neatness, please do not contact me. I, on the other hand, buy lenses to make pictures. I don't much care about cosmetics, or a few scratches here or there on the front element, as they hardly affect the image quality. The problem comes when time to sell some of these lenses. I really don't want the hassle of sitting there for an hour for someone to complain and whine about how this is not good and that looks bad. So I just keep them. Most of them aren't worth much anyway.
Perhaps, to reduce the number of lenses I may buy, I should acquire the same nick-picking attitude to make the seller mad, so that they would not sell it to me. But, in the mean time, I have hundreds of mostly worthless lenses sleeping in boxes.
Glowing Maple Leaves - Canon 1D Mark III & EF 200mm f1.8 @ f1.8. Click for larger.