HP iPAQ 312 Travel Companion - GPS receiver for $249 @ HT
Limited stock levels at various HTs around the country for today only
Not the perfect GPS according to reviews but very good for the price (half the RRP) given that it is 4.3", should do the job
Review here - http://www.goodgearguide.com.au/review/mobile_phones/hp/ipaq…
Be aware that the navigation software shown on the HT website is actually Mio DigiWalker software that has been photoshopped in and is not the actual software that runs on the HP unit.
Also, based on my previous experience with HP products and the lack of ongoing firmware/software updates, I definitely wouldn't buy this product with the expectation of ongoing map upgrades, especially given the fact that the HP iPAQ 312 is a discontinued product and HP Australia do not have any standalone GPS navigation units in the current product line-up (to my knowledge).