In the sixties, (Cashing in on the Bond / Spy craze) three of these films starring Michael Caine were made by James Bond co Producer Harry Saltzman's production company, and other production people used on the early Bond films (Such as Ken Adam, John Barry, Guy Hamilton).

The IPCRESS File (1965)
Funeral in Berlin (1966)
Billion Dollar Brain (1967)

In later years three more films had been made but not by Saltzman.
The non-Saltzman films are:

Spy Story(1976) (This film featured Michael Petrovitch, not Michael Caine playing the lead)
Bullet to Beijing (1995) (with Michael Caine returning)
Midnight in St Petersburg (1996) (with Michael Caine)

They all seem to be out of print in the U.S.A., and I would like to know if any of you have seen them. Are they worth seeking out at the high price imports and used out-of-print DVD's go for? I'm a huge Bond fan of the books and films, and very much would like to know more.