Computer Flohmarkt was a German small-ad-magazine wich was very popular in the scene in Germany.
It was a real analogue predecessor of the todays internet news groups and discussion forums, as many people used it for talking with each other. It was a time, when it didn't matter, if it takes two month to receive an answer on a post.
Computer Flohmarkt was published by Thomas Eberle Verlag in Maulbronn, Germany.
Thomas Eberle also was chief editor of the Schneider Magazin till 1987.