Yes I have definitely noticed the KEH prices on C/Y going haywire about a year or so ago.
I managed to get my 50 1.4 for around 225.00 (which wasn't the greatest deal considering) then shortly after they climbed to at least 300usd for bgn.
I even made a post about it back then I think.
If I didn't have 2 135 fl lenses already the 135 2.8 C/Y is one of the only ones under 2 bills haha.
I really appreciate the tests and both of those Kodak films are at the top of my user list.
I visit your flickr & blog fairly regularly so I know that even test shots will be useful.
Thanks again Rich.