The deal is via eBay. original sites provided to show initial discounts which lasts till 12th June. Amazon links provided for reviews/more photos.
Use click&collect to save on shipping.
Logitech Z213: AUD36.95 -> AUD27 -> AUD21.60
https://www.thegoodguys.com.au/logitech-computer-speakers-z2…
http://www.ebay.com.au/itm/NEW-Logitech-2637498-Computer-Spe…
Amazon review: http://www.amazon.com/Logitech-Multimedia-Speakers-Stereo-Su…
Logitech Computer Speakers Z623 1213073 Desktop Speakers: AUD199 -> AUD149 -> AUD 119.2
https://www.thegoodguys.com.au/logitech-computer-speakers-z6…
http://www.ebay.com.au/itm/NEW-Logitech-Computer-Speakers-Z6…
Amazon reviews: http://www.amazon.com/Logitech-980-000402-Speaker-System-Bla…
Logitech Computer Speakers Z200 2453263 Desktop Speakers: AUD 69.95 -> AUD 55 -> AUD 44
https://www.thegoodguys.com.au/logitech-computer--speakers-z…
http://www.ebay.com.au/itm/NEW-Logitech-Computer-Speakers-Z2…
Amazon reviews: http://www.amazon.com/Logitech-Multimedia-Speakers-Multiple-… (AUD 56 shipped, no deal)
Sounds good