Beware if you're shipping tube equipment sicne the fine print of FedEx/UPS disclaim any responsibility for "microwave tubes" and they normally widen the definition to cover all tubes. I bought a pair of Nagra VPA from this guy LUDUSX. Two of the tubes arrived with broken filament and FedEx simply declined to assume any responsibility and the seller doesn't want to hear from me. What's worse is that after I left a negative feedback against him, he did the same thing to me - by calling me a liar. To add insult to injury, Audiogon refuse to take the feedback away and declare that "Audiogon is not in any position to arbitrate." So this "liar" name is going to stick with me.
My conclusion, you're on your own if the seller is determined to screw you. Don't hold your breath on Audiogon to give you any help since they don't even want to hear from you.