Most do not realize how illegal counterfeits are. It is the same crime, same jail time, as counterfeiting money. To make one is a crime, to sell one is a crime, to buy one is a crime, to own one is a crime, to ship one is a crime, all serious crime in most the free world. Authentic manufactures have already been the victims of these thieves to the point to have significantly influenced the future of the industry. In USA getting involved with counterfeiting, everything used in the commission of the crime can be confiscated and sold at auction to pay restitution to the authentic manufacture. That includes real estate, autos, bank accounts etc. It is not an equal for equal thing, a $200 detector can cost one hundreds of thousands. Not knowing is the same as pleading guilty. With one authentic manufacture indicating 50 million in losses in one years time, expect no legal/financial breaks from authentic manufactures, expect to be made an example of, expect to be considers and treated like a thief, that is exactly what it is... theft. The law sees the buyer as the driving force behind these types of crimes and thus the buyer is just as guilty as the counterfeit seller and the counterfeit maker. 100% of adults know a $800. device doesn't go on sale for $150.
If you do see a counterfeit keep in mind it is stolen property. One doesn't want to receive stolen property, one does not want to own stolen property, one doesn't want to sell stolen property, one doesn't want stolen property on or within their property.