Searches for "jb hi fi black friday" spike every year as shoppers in Australia look ahead to the season's biggest discount events. The most reliable way to separate a genuine deal from a relabelled regular price is to compare against what an item cost in the weeks immediately before the event -- a real discount holds up under that comparison, while a merely rebranded price usually doesn't.
Retailers like Jb Hi Fi and others in Australia typically publish their seasonal specials through the same weekly catalogue channels used year-round, so checking a store's current catalogue in the days leading up to the event is the most direct way to see what's genuinely on offer versus what's simply being promoted more loudly.
For the widest view of what's currently discounted across Australia's retailers, browsing the full catalogue listing for this week is a faster way to compare than checking each store's own site individually.