Besides, it's difficult to trust any reseller, even if they're honest; the risk is quite high
You have a point, but you can minimize the risks by choosing an authorized reseller that has a brick-and-mortar store
[you even get to inspect the packaging].
I may be wrong, but I think the reason some persons prefer buying from resellers compared to the manufacturer is because of the shipping cost. As it may attract a lesser shipping fee or nothing when they buy from a reseller.
It's worth noting that the lack of a shipping cost on this method doesn't necessarily equate to an overall lower price, as official resellers must make a profit, so buyers will ultimately pay more. Another advantage in taking this route is that it won't lead to any data leaks
[if you only use cash] & future phishing attacks.