I found a guy on Craigslist selling the Nikon 50mm 1.8 for $95. He said that he bought it a couple of months ago and really hasn't used it much. I am thinking about meeting to see the lens, but what all should I look for when buying a used lens? And do you think $95 is reasonable? Or should I hold out for the 50mm 1.4? Any opinions are appreciated... Thanks!