Thank you for the article, kingfisher
It is not a bad lens, but I have another wide angle lens which is suited better for my goals.

I do agree that ebay is not the most trustable source, but it is almost the only source of fresh information. (Thread from 2010 (https://www.pentaxuser.com/forum/topic/fs--genuine-pentax-k-18mm-f-3-5-20130) is too old, I think but thanks for the https://www.pentaxforums.com/forums/36-sold-items/326931-sale-sold-pentax-k-18mm...

Why do I sell it? I am not going to keep it on my shelf, as I am not a big fan of wide-angle lenses. I do use them, but mostly for Aurora shooting and this lens is too dark for this purpose. It is just an unusual lens. And I totally agree with the average rating of this lens on pentaxforums.

I can provide several photos I made two days ago, but later today.

Thank you for your interest, Peter.

Quick search says that the price is approximately 600-800 euro, according to ebay

http://www.ebay.com/itm/RARE-Pentax-SMC-18mm-f-3-5-K-mount-lens-with-filter-caps...

or

http://www.ebay.de/itm/SMC-Pentax-18mm-F3-5-/162054224442?hash=item25bb2f3a3a:g:...

But, I am not going to sell for this price, as it is not in perfect shape and will be sold "as it is". In addition, I live in Trondheim, Norway, so it will be difficult to arrange testing of the lens.

From my side, I will be happy with 500

Hi there,

I'm selling up used SMC Pentax K 18mm f/3.5.

Got it a few days ago on flea market and had a possibility to check it quickly. Cosmetically the lens looks fine and everything works as it should.

If there is any interest we can discuss the price

Thanks for looking!