I've sold several items on Catawiki without any problem and would like to put some negative remarks from other persons in perspective (I'm not affiliated with Catawiki in any way). 1. The "experts" have to assess the products offered online, they can't touch or feel the objects. This fundamentally makes evaluation of some products hard if not impossible 2. Likewise, as a buyer only online assessment is possible with all it's drawbacks. Some items need to be assessed in person. Personally, I would never buy a car or expensive item without being able to see it in person first. The whole online thing is totally different from real person-to-person trades and a buyer should bid according to the extra risks - not on assumptions that everything is fine just because an expert has assessed the stuff. The expert just can't asses properly through online pictures only. If online wasn't possible, many items wouldn't even been available for buyers. About the shipping costs: a buyer should check shipping costs and again not assume things. Catawiki allows bidding from all over the world. I have items I don't want to ship to certain countries because shipping to those countries is unreliable or insurance is impossible. Therefor for those countries I specify very high costs on purpose to discourage bids from there. Reaction times from Catawiki support are indeed slow. However all my questions were answered eventually. Finally, Catawiki is for special products with collector value. The reason why I've ditched eBay for those products is that eBay support is 10 times worse than Catawiki, at least for me here in Europe, and that eBay doesn't seem to have the right exposure anymore for this kind of products. eBay has become a sort of Amazon for run-of-the-mill consumer stuff.