Catawiki is really a ridiculous auction site.
I do have an account there, but never bought anything. Even the descriptions, and valuers prices makes me laugh.
But some people go for it, get the auctioneers fees to pay, only to find out they paid way too much.
Or bought wrongly descripted items.
Catawiki is a horrible shithole.They do not take responsibility if the goods are sent and in what condition.There is no contact with them in case of problems.