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around what product price-point does Amazon begin to get more cautious?

It's not only the cost, but also the number of refunds on the account, particularly when they're In close timing.

Remember that the DNA Is predominantly carrier-based, hence considered a universal method. Be patient with the package, It will arrive and when It does and a signature Is requested, do so at the front of your premises and not on your door step. This way, any passerby could've signed and taken off with It.