I've seen those lenses on ebay previously... within the past few months.
A google search for the auction text turns up this auction from Oct '12
http://www.ebay.com/itm/Iscorama-Anamorphic-Lens-Pentax-M42-mount-near-mint-condition-PLUS-EXTRAS-/150914712174?nma=true&si=nMUXSZpxgvrFZEtjVXF5IY0pTOc%3D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
You might contact that seller and see if this new seller was indeed his buyer in October.
Also, that's an original model Iscorama with an M42-mount taking lens - not an Iscorama 42. The rear element on that lens will be about 10mm smaller in diameter than an Iscorama 42.