[Defenderland]

I can't see from the pics, that the unit was somehow mistreated and Booxtor himself stated, that they can't say so.

In Germany/EU there is an important distinction beween "Garantie" and "Gewährleistung" (IIIC both are called "warranty" in english):
A new product bought from a commercial seller is under "Garantie". This implies the customer has the right that a defect is solved. If the seller does not want to solve the defect he has to proove the mistreatment of the unit. This is a very important aspect.

This changes when the Garantie - warranty period - has expired and the unit is under an extended voluntary period of "Gewährleistung" (i.e. important when buying a used car from a commercial seller). Then the customer must proove, that he did not mistreat the unit. Which is almost impossible and therefore "Gewährleistung" is almost useless if the seller is caliming the customer caused the defect.

EDIT:
It seems that in English the corresponding word for "Garantie" is guarantee and "Gewährleistung" is warranty.