Just got back and dropped into Harvey Norman QV on the way home. Sony standard headphones for $9.95 from $27.95. Model number is MDRE10LPH. Price varies wildly from $15 to $30+ depending where you live. I think this is a store specific sale as I didn't see it in the catalog. Not sure on the quality of the headphones itself but thought it might be useful for someone.
http://www.staticice.com.au/cgi-bin/search.cgi?q=MDRE10LPH&s…
They are also have 50% off a large range of headphones such as Sennheiser, Koss, Skull Candy in the bargain box. Didn't get a snapshot but there was about 30 units of different brands.
They have the Microsoft Wireless Optical Notebook 3000 mouse for $18 which is not a bad deal. Also the Microsoft Wired Desktop 600 keyboard and mouse for $18 which isn't listed in the current catalog. A dolla cheaper than MSY but you don't have to wait half an hour in the queue and the store is neater
Cheers
not sure if your maths is right for $27.95 @ 50% = $9.95 but a bargain worth checking out sure.