Translation of "Knocking shop" in German

Although it's not always easy getting a receipt from a knocking shop in Manchester, is it, Mart?
Obwohl es manchmal schwer ist, in einem Puff eine Rechnung zu kriegen.
OpenSubtitles v2018

Your associate Sonia Bern has raised prices at that knocking shop of hers.
Deine Partnerin Sonia Bern hat die Preise in ihrem Puff erhöht.
OpenSubtitles v2018