First time lister, so apologies in advance. Unsure of an end date - might finish tonight.
Not sure who here uses the Oz-focused ShopBack (similar to ShopRewards, KiwiWallet, etc.), but they've got 50% cashback at Book Depository today, capped at AU$10. Will probably be too late for Christmas delivery, but it's always good to treat yo' self.
Assuming it gets tracked correctly, you'll be able to withdraw the cashback to a PayPal account some time in February.
ShopBack have had a quite a few deals of late, and they're good for AliExpress, eBay, and a few other big sellers, but like I said, they're Oz-focused so YMMV.
Excellent referral system in operation too - was set at $15 last week, but back to $5 now. I won't list my referral code, but if you track one down, you should find yourself with $5 in your account to start with, so that'll be a little extra for you to withdraw when the Book Depository one clears.