Thanks, Dug ... but no, nobody does free postage to Australia anymore. (As far as I know). :-\ The days of Book Depository and free postage to anywhere are, sadly, long gone.
I found
Strata on Abe Books, for a reasonable price ... but postage is 3 times the price of the actual book. (It's still fairly reasonable, all in all, so that's OK).
***WARNING, LONG RANT ... SORRY***
On the other hand, someone on Abe Books is also selling Strata -- and calling it "Signed, First Edition, Hardcover" -- which is ridiculous, because the First Edition of any book is always hardcover, isn't it? Unless the author is skint, or indie, or doesn't want to spend money on hardcovers -- anyway -- and the guy is selling it for ... *drumroll* ... $1,100 US.

(Plus postage of $45.00 ... US).

Dust jacket, near fine condition, autographed, minor bumps and wrinkles and so on ...
... and I know it's hard to find, I know all that ... BUT. $1,100 US.

Can anyone afford to pay that for a book, even a Terry Pratchett signed 1st-edition? Especially now, with the so-called "Cost of Living Crisis", that's a bogus crisis anyway, because it's been manufactured by our own Dear Leaders -- 'cos you know that it's not only North Korea who has a Dear Leader, right? -- who thought they'd start a war to drive up the cost of petrol and thereby make everything more expensive, so they can line their own pockets with private deals while also impoverishing the country that voted them in, in the first pl.......... oh shit, I'd better keep politics out of it. *back-pedals furiously like Lance Armstrong going in reverse*
Anyway. So, I also found Marc Burrows' "The Magic of Terry Pratchett" on Abe Books, for $22.68 US ... plus $1.50 US for postage. Which, let's face it, is not bad for a second-hand book. But when I looked up the "Lowest Price" on the same book, I found another store selling it for the low, low price of $1.69 ... which someone might think, "Gee, what a bargain!" ... but the postage is $75.00.
Pardon me for swearing, but that sounds utterly f***ed up. I mean, $75 for postage from the US to Australia? And both books are described as new and in mint condition, so the only difference is, the first store is in Illinois and the second one is in Pennsylvania.
Um. Now, I don't want to indulge in conspiracy theories, but ... what's going on? I mean, what the hell happened? Has the Pennsylvania Governor delivered budget cuts to his own state's postal service to the point that it's totally collapsed, so he can take the money and give himself a holiday (oh shit better keep politics out of it again), so now Pennsylvania has to rely on a system of
glingleglingleglingle little post-delivering pixies?? Or maybe this bookstore is employing the Feegle Hamish to fly on the back of Morag the buzzard all the way from Pennsylvania to Fourecks, just to deliver my book?
Apologies for the rant.

But when one shop can do P&H for $1.50, and another takes $75, it's a bit ... odd. Any ideas what's going on? Or is this normal, and I just haven't been paying attention?