Is it illegal to buy privately collected Qing Dynasty silver ingots?

Break the law. Precious cultural relics belong to the scope of national cultural relics protection, including but not limited to bronzes, jade articles, ancient books, calligraphy and painting, etc. Collecting, trading, transporting, delivering and mailing national cultural relics without permission will face serious legal consequences. The purchase of cultural relics should be carried out through formal channels, cultural relics operators with legal licenses or cultural relics auction companies.