doh, probably because you don't know about it LOL

ok

on the left hand side of the search page after you have your results are lots of ways for you to refine your search.

About 12 inches down the page on the left hand side, underneath where you choose "Australia Only", Show only etc, is a blue link called "More Refinements"

click on that

a pob up box appears

3rd from the bottom, left hand side is a hyperlink "Item Location"

click on that

then you get to the box where you can selesct distance.

I think that would be heaps easier as you don't have to scroll past completely irrelevant listings.