There's no need to suspect - looking at the regulations, it seems that the standard AML/KYC laws everywhere in the first world already require anyone selling anything large with an untraceable payment instrument (i.e. anything other than through a financial institution; which commonly means cash, but not exclusively so, bags of diamonds or Monero count as well) is required to report the transaction and the identity of the customer.

It doesn't mean that everyone reports that, quite the contrary, but all legitimate businesses do and will.