I saw these S10s on sale at Harvey Norman earlier this year for around $70. The other model they had the S20 was also around the same mark, maybe $75.
But they are a bit limited as GPS watches go. The S10 for example could only save 9 waypoints and I couldn't work out how to input a location without first going there and syncing GPS.
The S20 was initially shown with a dotmatrix screen, but when I saw it, the display was quite a poor LCD screen (not the dot matrix screen as initially shown in the pics).
But if you still want to have a look at these, Laser the company distributing these look like they are getting rid of their stock:
http://www.laserco.com.au/navig8r/sport ... VWATCH-S10 S10 - $58.48 + shipping
http://www.laserco.com.au/navig8r/sport ... WATCHS20-G S20 - $44.98 + shipping
Shipping to Melbourne was $12.10 for me.