Not Sure If This Is OK Here, But Here Goes

I live in Mexico and we import from Italy.  The process for us is to hire an import company in MEX to negotiate with the Italian manufacturing company.  The Italian company must be paid by the MEX import company before they will ship.

Because of a recent contact by an Argentina importer, I know the process is the same for Argentina.  

If the Miami company is legit, they must be willing to wire the funds to you bank account before you ship.  Import/export companies send hundreds of bank wires and letters of credit a week.

Good luck!

I’ve used PayPal routinely for international trabsactions, i.e.,, So. Korea, JPN, FRG, UAE, Qatar, and UK. The most expensive single item was ~$30,000. All transactions and monetary exchanges were smooth. On one occasion, an unexpected shipping delay occurred. I prematurely reached out to PayPal, who shut down the seller’s account until I pleaded on his behalf. I would proceed but with caution as urged by our hobby peers. 

Being Maggies your speakers will sell if the price is reasonable. There's not millions of people buying high end speakers out there so sometimes it may take a month or two to sell something. I agree with others that it isn't worth the potential problems.

Run and don't look back. Don't mess around with that sale.

I've sold to Agoners in Latin America who wanted to work with a freight forwarder. 

The issue I've experienced with freight forwarders is around the packaging of the item. The freight forwarder oftentimes removes the item from the factory protective packaging in favor of their own--much smaller and less cushioned--box. Both times I've shipped to a  freight forwarder, the gear arrived damaged.