I just realised that Amazon was one of the first to launch their Black Friday deals, starting on the 14th of November and they have daily deals during the "countdown" to the actual day, the 25th of November.
Today they've got Casio watches starting from roughly USD $70 with delivery fees of an extra $7.08.
The total on the cheapest model, the PRG-300-7CR Pro Trek Digital Watch with White Band would work out at USD $78.07, which is about AUD $105. That's pretty decent considering the same watch on eBay would cost you no less than $180 and local watch shops sell this model for over $200.
There's also some models for $94.07 (AUD ~$125), like the Casio Men's PRG-300-1A9CR Pro Trek Triple Sensor Tough Solar Digital Display Quartz Black Watch, which is currently selling for $192 with an extra $20 in shipping on eBay and COTD has the DR model for $159 delivered. Honestly I have no idea what's the difference between the CR and the DR model, sorry guys.