I did 2 transactions in the correct period from the opening offer, that were over $50 from deal extreme, but am skeptical if paypal will pay up. Just went to that link and it's all been changed now.
http://www.paypal-offers.com.au/shopoverseas/Conditions have now been altered - it's $100 now, and the period has changed.
1. Click on any of the online retailers above
2. Pick the items you like with a total purchase value over $100 in one transaction
3. Checkout and pay by PayPal
4. Sit back, relax and wait for your orders to be delivered
+ get $20 cash back into your PayPal account by 04-Dec-2009*
* The Offer begins on November 04, 2009 at 12:00:01am AEST and ends on November 15, 2009 at 11:59:59pm AEST (the "Promotion Period").