How do I identify a scam? (A buyer buying same qunaity and same prodcut every single day)

How do I identify a scam? From 4/23/20204 to today, 4/27/20204, a buyer has consistently purchased the same quantity (6) of the same items each day, totaling more than $900. I even called Amazon seller support, and they stated it was fine; please ship. However, I am concerned that if the buyer raises an issue, such as not receiving the goods or something else, I risk losing both the money and the merchandise. I even messaged the buyer, but received no response.

Please help.

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