it really does happen a LOT on the 1.2 Pentax mount lenses. So much so, I have even stopped sport shopping on eBay. Meaning well over 50% of the positives I get in my rather advanced search, that took a while to fine-tune, are for 1:2 rather than 1:1.2.
Most are incorrectly listed lenses but also since eBay stopped allowing punctuation to be part of searches a 1:2 lense will return as a positive hit on a search using "1.2"...it's frustrating even if I could afford one right now finding them is a PITA.
Until all sellers begin using the "item specifics" as they should they are also next to useless as well.
And this seller is a great example of being well over his/her head in listing camera gear. I am sure the eBay notes are near to driving the seller nuts. I feel badly for the seller and a bidder who is expecting a different lense as well...the nice thing is the seller can let the buyer off the hook by explaining to the winning bidder and doing a "mutually agreed to not complete the transaction" thing BUT there are so many ******* bidders out there that will assume, absent proof to the contrary, that the seller is trying to cheat them and not sell because the item did not end high enough.
Best thing is for the seller to simply end the item and re-list correctly. Part of the fun of online buying and selling...having once mis-listed a $600 piece for $56.50 I know what it's like but it was my fault and I ate the loss because I was too tired to be listing that night anyway. Sad thing is, it would likely have sold just as fast at the proper price...today it brings over a grand....for a silly glass animal made in the 1980s...