The router issue is even more insidious as the vendors may not even know which version they have as the manufacturer considers them all identical even though they can be entirely different.
I don't think it has reached that stage though - so far, they have been clearly labelling the full model name of the product on the box and / or on the product. (I think it may be illegal for them to do otherwise as they have to obtain various certifications when they ship the product). So the vendors do know what products they have. It is kind of deceptive advertising on Amazon - they deliberately mislabel the product model by not including the version number (which is actually part of the model name).