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A somewhat rare M 100/f2.8 . Seller accepts best offers.

Asahi SMC Pentax M 1 2 8 100mm Telephoto Lens w End Cap Hard Case Compact | eBay

[monochrome]

That price is about 10% low. EX+ (used but spotless) they're about $165

[Stavri]

That price is about 10% low. EX+ (used but spotless) they're about $165

...depends on the accepted offer, looking at the sellers store I'd wager he's reasonable..

[From1980]

I just looked at that one. Be careful-see if the seller will post better photos of the glass. Lens front element is obscured by Skylight filter and the photo of the rear is too dark to see element surface. Interesting though, the camera store I worked at in Canada priced this lens for $169 new in 1980. Also, that gungy looking case makes me wonder what kind of environment the lens was stored in and I would really want to see the glass better.

[jimr-pdx]

It's always comforting when the paint on the aperture & focus rings looks so good - but true the glass itself could be shown better.