I would guess that some of this has been discussed before,but this isn't the typical EBay section post. The 2nd listing is a guy named 427king,and it would seem that he has been hoarding the mother load for a few decades.
It isn't every day that you see one of these. Remember,this is the early closed chamber version. It has never been stamped with a VIN,and I don't think it has a CE on it either. It is a blank canvas for stamping. It would even be a re-stamp,because it was never stamped or installed in a car to begin with!
http://www.ebay.com/itm/331582666902
A different seller here,but if you check all his other items,it would seem that somebody robbed a GM warehouse in the late 60's. Stuff like this doesn't exist. Say what you want about prices,but somebody went thru the trouble of spending a lot of money on the rarest of rare brand new performance parts almost 50 years ago,and kept them hermetically sealed for the future. A lot of it isn't NOS,but mint original,stuff with no VIN etc. This guy can write his own ticket as far as I am concerned. Check out all his items'this one is just the tip of the iceberg.
http://www.ebay.com/itm/NOS-1967-L88...item35e9888737