You completely overlook that Jeremy Bamber used exactly the same description of the photographs to Michael Fielder as he did to Colin Caffell, namely that "they show everything down to the last detail."
I don't ignore this at all and have shown in detail exactly how Fielder could have known already that JB had described the photos to Colin in this way.
In a nutshell, the relatives were talking to Colin giving Colin the impression that they were trying to frame him. They were also interfering in the police investigation. It has been shown previously that a number of people were aware of the existence of the photos. Given the conversations that the family had with Colin and their obvious attempts to frame JB, I would be surprised if they hadn't found out about the pics themselves through Colin.
If your case that JB tried to sell the pics relies on Fielder's use of nine words in his 300/500 word article then it is a weak argument, Steve.