Really, one of those two pages has to go. It's a stretch for this to make sense at all of both of them are there.
You're overthinking this. It's simple.
The buyer and the seller both had the chance to not break the rule by not completing their end of the sale. Trump didn't die because he didn't take the Death Note. Minoru died because he DID take the money. The catch is that Trump knew how to not break the rule because Ryuk told him. Ryuk would have also told Minoru how to not break the rule, except... Minoru told him to never contact him again for any reason. Thus, Minoru broke the rule as soon as he took the money, and Ryuk dished out the punishment. Minoru's overconfidence in his "perfect plan" killed him.
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Seplito Nash, Smelling Like the Vault since 1996 Step FOUR! Get Paid!