The lens is scrap, and barely worth the money - these things were not calculated to satisfy much more than the 500kPx TV resolution, and that only within a image circle smaller than APS. If any, it would do as a low DOF soft portrait lens for a M8 - but so would the bottom of a coke bottle.
ebay prices recently have been rather high, but that probably is due to a mixture of shill bidding and uneducated buyers. Unconverted CCTV lenses with similar spec usually go for $10-30 at surplus dealers, and sometimes even show up, along with more desirable bits, in $10 surprise bags from the same.
The way it is worded, I am almost tempted to grab it and sue him for delivery of the M6 it is "on". Not worth the hassle in real life though - even though chances to win such a suit are extremely high, most people who have attempted to put the squeeze on a cardboard box seller have experienced that they had spend much more money going after him than they could ever get back...
Sevo