Target currently have 30% off clearance electrical items … this includes the wireless mouse / keyboards that were posted @ https://www.ozbargain.com.au/node/245803
Went into Fulham Gardens Target (SA) and they had stacks of them. If you're lucky, you'll even get a free layer of dust on top of these as a bonus!
Have used both - for the chump change these cost they are an absolute bargain! Only downside to the keyboard is the chunky Enter key - hate that keyboard layout (especially when the FN key is where ALT should be, and / is in the wrong place) - but for the price you cannot go wrong!!
The wired USB keyboards they had for $1 (I think it was) would also be included in this sale - they had pink, green, and black, but didn't bother with these - although they have the proper keyboard layout (with a normal slim rectangular Enter key).
Both come with a small plastic USB dongle tucked inside the battery compartments (and both take 2x AAA) - about the size of a Logitech Unifying dongle (only sticks out about 6-7mm). The mouse has an on/off switch, whereas the keyboard doesn't.
I got both of those at about $5 a piece. The keyboard is ok, but the mouse is terrible. The clicks never worked properly, often no response or multiple clicks, and the pointer was all over the place. Maybe I got a dud, but it was tossed pretty quick.