Searches for "walmart black friday flyer" spike every year as shoppers in Nigeria 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 Walmart and others in Nigeria 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 Nigeria's retailers, browsing the full catalogue listing for this week is a faster way to compare than checking each store's own site individually.