Haven’t checked eBay here for ages; but just seen there’s now an English Beta page. I see from this there’s a sign up page, with Chinese and English instructions; and note on the right saying:
the new eBay.com.hk English beta site. Additional site functionality & communication will launch in the coming months.
– so at least it’s possible to sign up, maybe start doing things!
You can reach this via English link near top right of: