eBay Help is at the top of every page
How long have you given the seller to reply?
How do you know the issue is caused by the seller/seller's end?
Are you trying to buy something from within Australia, or from overseas?
Are you trying to buy something that is restricted?
Are you trying to buy something very expensive?
Are you trying to buy something that comes up as out of stock?
Are you trying to buy something from a seller with a banner on their page saying they are away?
Is that all the message on the page says?
