Not Sure If This Is OK Here, But Here Goes

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. 

I am suspicious as a general rule. But in this scenario, as long as you are being paid securely up front, and provide no personal info, it's on him to get your speakers shipped securely for the final leg of the transit.

Only accept wire transfer,pack well and take pictures 

If it's too good to be true, it isn't. If something isn't selling and you want it to move, you have to lower your price. Simple economics - supply and demand.