eBay

I have a 10 item selling limit here on ebay because I'm new here on ebay and I understand why but how can I tell WHEN EXACTLY I can list another 10 items?

I'm new here and have a few scenarios ,how am I protected for example if I sold for example a iphone 5 ,I get a tracking number with delivery confirmation and canada post shows it as delivered,but my buyer says for example that there was no phone in ...

How can one ship from china and have free shipping? I just bought 19 items from 19 different vendors for less then $6 total,explain how they can ship across seas to canada for free if most of the items I bought are less then 25 cents.