Agreed. It sucks.
If the manufacturer warrants the product to be free of defects for 3 years, then why does it matter who the current owner is and where they bought it from? Either the item is under 3 years old and has a fault, or it is not.
Because once it's outside of the authorised dealer network who sign up to various terms regarding storage handling transport etc, they have no idea what's been done to it so it could be your fault due to miss handling