I bought from keh.com and this lens I bought got a rating of EX somemore.
but they are not bad at resolving this matter, they send me a replacement lens (no further charges, shipping included) to me which is EX+ condition! That gives me the confidence to buy more things from them.
Just ordered a Contax 167MT body from them last night. Also EX condition.
The k-r I bought can't take photo of the dust, because my skills not there.
Anyway I met up with clubsnapper fatigue, he says it's filled with dust.
So I left it up to him to clean it up for me.
He said it won't affect the Image Quality, but I sent it for cleaning so I can sell it off later anyway