dwchiang - they prefer you send via USPS. I returned a VP100 (for a VP150) from San Francisco, but don't recall the actual cost. It was low enough that I was not irked (less than $20.00). You can measure the weight of the speaker boxed and look up the shipping costs with the USPS here. Or email Axiom and ask them. They can give you a rough idea what the cost would be.