This weekend, selected Transformers comics are on sale via Comixology.com or their apps.

(Note these prices are the AUD prices via the app store, the website list US prices so it might vary with $USD to $AUD converstion if you buy online)

Titles on sale are:

Monstrosity
(The new digital only series)
Issue #1 $0.99

Autocracy
(The digital only series)
Collected (#1 - 12) $6.49

Transformers: Optimus Prime
(the epilogue to the ongoing and the prologue to the two new series)
Issue 1 $0.99

More Than Meets The Eye
(The outer space series)
Vol 1 (Optimus Prime, #1-3) $4.49
Vol 2 (#4-8) $5.49
Issues 1 - 8 $0.99 each
Annual 2012 $1.99

Robots in Disguise
(The Cybertron series)
Vol 1 (#1-5) $5.49
Issues 1 - 8 $0.99 each
Annual 2012 $1.99

Last Stand of the Wreckers
Collected (#1-5) $4.49
Issues 1 - 5 $0.99 each

Once purchased, you can read the books on your computer, iPad, iPhone, Android, or Kindle Fire.

Bonus savings:

If you've got an iDevice, go to Dick Smith and buy some iTunes Cards at 20% during their current sale. Use that credit to buy the comics on your iPad or iPhone and you'll save an extra 20% on these prices: $0.79 an issue, $3.59 for the Wreckers series collection (great price!) etc