I have bid on Catawiki and have won a couple items. I paid for the first winning 4 days ago. So far 3 full business days have gone in full, but the seller and the Catawiki themselves did not email me any messages regarding shipping my items to me. Yet they sent me a new message to pay for the next won item. I feel uncomfortable already. I also think that charging on average around €19 for shipping via registered mail is a little bit steep, thus Catawiki mailing charges are often way too high. Perhaps their sellers are earning a lot of extra money on shipping?!