I don't think Fedex or UPS will offer that service but may be wrong. There may be local packaging service companies that will do this. That said, building packages for speakers isn't rocket science. Depending on the speaker size it will be labor intensive though and take some doing to procure the packaging material. Still, you may be better off trying to sell locally, or regionally (eg deliver them yourself or have the buyer meet you w/i 100 miles). Regardless of packaging, the moving/handling in transit can be hard on speakers as they're not engineered for shock stresses.