Think like a bureaucrat. How will an average citizen react when a purchase item results in harm, regardless of whether the item was misused? Virtually all of US citizenry will resort to contacting some scum lawyer who will extort money from manufacturers, distributors, government regulators, and anyone with "deep pockets."
Shunting responsibility and accountability has become a human right in the West, especially the US. Recently, due to the muck demanding the government to enact measures to curb the "opioid epidemic" by punishing pharmaceutical manufacturers for drug addicts misusing their product, local governments have pursued legal action against major pharmaceutical industry. Somehow, dissolutes wasting their life away by misusing medication has become the fault, not of the addicts, but of the manufacturers and distributors. It is quite similar to how obesity is not the fault of the fat slobs that can't stop shoving food into their fat mouths, but obesity is the fault of fast food restaurants for not having "healthy options."
Those bureaucrats in position of regulatory commission will be the first to be prosecutes, if some fool offs himself misuing a medical devise. Next the distributor, ebay, will be sued. Then the manufacturers will be held accountable. The mob may even come after you for selling the devise "irresponsibly." The government regulation protects you, the seller, from the muck.