If you open an item not as described dispute, you may have to go to a little extra effort to let PayPal know / understand that you can not return the item (a usual requirement for receiving a refund), since (I'm assuming) you don't have a licence as required, and it's illegal to post counterfeit items, instead, you may have to provide evidence from a licensed dealer that the product is fake, and/or evidence of the item being destroyed.