You can't scrape network effects. People don't want to buy something, they want to buy a specific thing and that is only available if there are enough users on

You can't scrape network effects. People don't want to buy something, they want to buy a specific thing and that is only available if there are enough users on the site for one of them to have your specific niche item. And no, not all countries have an equivalent with a user-base that even comes close to eBay.