Cheapest I could find was eBay for around $60 from International sellers or $89 from an Australian seller and >$100 from Harvey Norman, Officeworks.

Hi Guys,

Today we are offering free accessory kits with any of our desktop PCs at our store - http://evatech.com.au/128-desktop-pcs

Second Post..

I was on my way back from work, and found that this keyboard was on clearance sale

Logitech MK270 Wireless Keyboard and Mouse Combo $28 or $23 with Code @ HN

To get $5 off you need to sign up for a new account first to get a non-generic code that to be used in 48 hour.

Hi all, my first post.
I found this deal on Officeworks website. Please note: only the Dark Silver one is on clearance, other color ones are $24.97 pickup.

MSY has it on clearance for $49.

Description:
A sleek and streamlined design with concave keys adds style to workspaces.
Provides quiet and feel-good typing for extended periods of time.

Casio LK-120 Key Lighting Keyboard $98 Delivered @ JB

61 full-size keys with 100 tones 50 rhythms and 12-note polyphony
100 song bank tunes
2 x speakers with 2w+2w amplifier

Logitech Gaming Keyboard G110 is on clearance at Officeworks for $39.

Logitech K810 Bluetooth keyboard for PCs, Tablets and Smartphones. Ultrathin, compact form factor with backlit keys and auto-sensing illumination.

No sure if this is a good price, its been cheaper @ Camel but its the first time they ship this keyboard to Australia.
Looks like a good price when I researched the prices of mechanical KB

Logitech Wireless Touch Keyboard K400

About $20 cheaper than other Australia Online shops delivered as per staticice

I don't think this is a special deal but it's certainly the cheapest that I could find. Staticice lists the next cheapest as $149.