it's not fraudulent if you are not trying to purposely be misleading. these knock off sellers are freely admitting their crappy quality products are copies. They are not selling them at $150 claiming they are the real deal. If they were, THEN it would be fraudulent.
Now, the people on eBay who are claiming they have authentic articles and are charging big dollars for them when they aren't real? THAT's a scam.
Let me give you an example of something. I do reviews on watches that began with reviewing Casio G-Shocks. I have a good relationship with Casio and have had some great conversations with their Director of Distribution.
The fact is, Casio spends a LOT of money in marketing, branding, research, quality assurance, manufacturing, and distribution. There are sellers out there that rebrand these fake watches to look like G-Shocks, and they call them S-Shocks with the S looking very similar to a G. They steal the entire look of many of Casio's models, particularly their limited editions and sell them on Ebay and streets. Along with these, there are plenty of knockoffs that do the same thing. So you could sit there and say, who cares, Casio is a multi-billion dollar organization that charges too much anyway. So people sell these fakes, most AS fakes and charge less for them with everybody knowing they are fake. Now Casio has to pay for security too, they try to put one fake seller out of business, and 2 open in its place. So all these watches are being sold. Casio puts out all the creativity, marketing, building the brand recognition, and these sellers illegally and fraudulently capitalize on this.
This process is a scam in itself, that has been my point. It forces companies to have to allot money towards stopping this, it deters creativity and originality, and prices of things that could be lower priced increase as a result. So again, justify any of this activity all you want, but understand the overall scam you are a part of as either a buyer OR a seller.