Too many bad experiences as a seller.
As a seller I've rarely had such a bad experience. You have no protection at all. Catawiki see you as nothing more than a cashpoint to charge very high commission yet offer NO PROTECTION at all when something goes wrong.
My final loss on catawiki is around 200 euros. Why? Because the buyer sent me an incorrect address so the package was lost. Because the address is incorrect the package is uninsured.
Catawiki see this is the sellers responsibility so the buyer is refunded.
Tell me in what world this is the sellers fault?