I would like to buy a cheap bicycle in Germany. Is there any place to search for a used bicycle (like a market or an internet site)? I don't speak German so places where people might speak English are preferred.
Open in Chrome and use 'Google Translate'. 'Fahrrad' is your keyword.
P.S. Most German people speak better English than some English people do!!!
Technically not in Germany but 2 kilometers from the border, there is this market:
It is run by a non-profit. A few hundred bicycles at each event, you can put your own for sale too. I bought one of my bicycles there.