Back from my short trip.
I bought the german issue of Companeros called Lasst uns töten Companeros I didn't know this one existed, it has both english and german audio, lots of extras, and also a good-looking cover.
I only had this film on videotape before, not the Anchor Bay-issue.
Then one of the east german DEFA-westerns Blutsbrüder starring Dean Reed, the american actor who had leftist political views, who made spaghettis in italy, and then went to live in east germany in the seventies.
I also bought, among others, Quintana er kämpft um gerechtigkeit by Vinzenzo Musolino, a low-price disc with only german audio, no extras, but with good picture quality, and a terrific theme-song.
I didn't find any Müller-shops, gibt's vielleicht nur in süddeutschland?