Well yesterday my cousin ordered an item for me over Ebay.

The seller lives in America. I live in Australia.

Any ideas how long it will take to arrive?
That depends on what kind of postage the seller is using. It could take anything from a couple of days to about a couple of weeks.
Quote by GodofGuitar1991
you are a real guitarist when you are not ashamed about masturbating to musicians friend magazine.
just pretend you didn't buy it, and in 2 months, it will unexpectedly show up at your door. Trust me, counting days will drive you crazy
generally less than 14 days, i've ordered a few things from the states (also live in OZ) and they usually take 2 weeks.