Here is a news article I've just come across about seized counterfeit metal detectors.
Counterfeit metal detectors worth Dh4m seized, three arrested.
According to Major-General Khalil Ibrahim Al Mansouri, Assistant Commander-in-Chief of the Dubai Police for Criminal Investigations, the gang rented a warehouse in Dubai to store duplicate devices of a well-known British brand of metal detectors. They then allegedly exported these devices as genuine.The police seized 24,372 devices, including 495 counterfeit metal detectors, 8,550 batteries, 6,557 bases of metal detectors and 1,000 columns used in installing detectors....
Be careful out there you just don't know what you may be buying.