Reasons that one sold low:
- Seller statement, "The item is old and needs a bit of cleaning, it doesn't look to have broken pieces but I cannot guarantee it's in working condition."
- Sold as is, no returns
- Seller normally sells clothes and sweaters, and a few beater cameras
- It's the Summer slump, when no one is buying
- The pictures are poor, lit in weird yellow lighting
The buyer took a risk, and that's worth about $200, to see if it's a good condition lens. Is the iris working? Is the glass scratched? We can't see the barrel chrome condition. When you buy one that is advertised well, as in good condition, they sell for about $400. Like someone said above, try to buy one for under $400, and not get a scratched up dog. Condition is everything, like in all lenses. Bottom feeders take chances on getting a good one for cheap....it's like gambling.
Again, compare the ad of the cheap one, and this one, and think about how much "not knowing" is worth to you:
http://www.ebay.com/itm/Nikon-5cm-f...a-Thread-Mount-with-Case-320522-/261256483254