It depends on the category you're looking for. In some categories like slot cards eBay doesn't even come close. Right now they only have about 1,300+ listings on eBay while Delcampe has almost 17,000 listings. If it's anything non-casino related collectible, Delcampe runs circles around eBay with things like postcards, stamps, coins and other things.

Part of the problem is the categories on Delcampe that many in the US are not familiar with and they don't really have a central casino collectible area like on eBay. I've been begging Delcampe for years to create a better area for casino related stuff but it's just falling on deaf ears unless more people ask/complain/suggest. At least they listed our convention on their calendar.

I'm on both sites and sell at least a hundred times the quantity on Delcampe compared to what I sell on eBay.