Logitech V550 NANO Laser Mouse & Logitech V470 Bluetooth Laser Mouse.
On sale at Shopping Square for $40 each, plus $10 postage (or $15 for Tas and other such locations).
The V550 Nano is the main deal (best value), the other one i'm just posting cause it's part of the same offer and it's still a pretty good price. Take your pick, 2.4Ghz wireless or bluetooth.
The V550 is a minimum of $50 from various online stores according to staticICE, which you have to then add on postage or travel costs to where ever the store is (that's if the store is in your city/area). So i think $50 incl postage is a pretty good deal.
Ends Wednesday 11am AEST.
LINK: http://www.shoppingsquare.com.au/category_promotion.php?pid[]=1481&pid[]=1480
(for some reason the url entry on this deal submission isn't working, and it doesn't accept the full link, and it's linking to just the V470 page. If a mod can fix this so the real link works pleas)
Not bad. If you're mainly after something with the Nano receiver this is another deal to consider though:
http://www.ozbargain.com.au/node/17330
Bought one of those for $24 + $9 shipping.