Repeat offenders are often recognisable by using the same product photos for months and only changing the seller name. Occasionally, providers combine an original photo with a second shot that, however, shows a plagiarism; decisive are fine differences e.g. in the grooves or inscriptions. Even sellers who unintentionally take over picture material from foreign auctions can distribute plagiarisms. A careful picture analysis and comparison with documented originals are therefore indispensable.