It's getting to be like shooting fish in a barrel these days - and these are only from Pentax searches. There are times when this is funnier than the Joke Thread.
Firstly, some interesting unrecorded lenses :
Items for sale by ericson007 | eBay
Than, a lens that mutates from f2.8 to f3.5 as the image is posted :
Vivitar Series 1 70-210mm f/2.8-4 Lens For Pentax, Macro Focusing | eBay
Next, the extremely rare 36mm Spotmatic, complete with 'long lense' and most importantly, a strap - totally unobtainable elsewhere.
Pentax Asahi Spotmatic 36mm Camera + Long Lense + Strap | eBay
And finally (there are probably more, but I get dispirited at the human race's persistent ignorance) :
Pentax mz-50 Camera. 2 x Vivitar lenses and 1 x Hoya lense + Cobra Camera Case | eBay
Migrates from an MZ-50 to an MZ-20, no details or helpful images of the lenseses (!). Surely anyone wishing to sell an item has the nous to present it in the best possible light ?
I give up.