UShip?

I have used UShip a few times to ship speakers and it worked out well. Be sure to vet the bidders and open up some clear communication for what you have and how it will be packed. I helped load the boxes on the trailer or truck in each case and could see for myself how they were packed in and would be transported. No issues.

@waltersalas Thanks!

Anyone else?

I've used Uship and you can choose carriers based on feedback just like in ebay. The best experience though is when I simply use cargo airlines.