And it says that the glass is scratched. See, plenty of details!

I read a description of a Zeiss Luminar on eBay a couple of days ago. All it said was 'Iris opens and closes'. Apart from the colour, what more would anybody ever need to know? And how many long-winded, rambling lens descriptions about 'clear glass' and all that irrelevant nonsense omit to tell you that the iris not only opens, but closes as well?