I live in China and just bought a pair from an app called XianYu. It's an app for used goods but small shops also sell there to move inventory. It cost me 2500 RMB, roughly 350 dollars; on Taobao (basically China's eBay), it's going for the equivalent of about 500 USD. I'm uploading the original ad with the Chinese machine translated. Don't puzzle too much over the translation--for instance, weight without lock plate means without cleats.