As the title suggest, I'm looking for the most popular online marketplaces that sell used items (but also new) in South Korea and Taiwan.
What I'm looking for could be described also as the eBay and Yahoo! Japan Auctions equivalents in those two countries. Since Yahoo! Japan Auctions is obviously limited to Japan and eBay is not really relevant in both South Korea and Taiwan, I would be grateful to hear your recommendations as I know zero places that would suit my needs.