Computer Flohmarkt was a small-ad-magazine in germany 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 released by Thomas Eberle Verlag in Maulbronn (Germany).