I need some advise on a shipping disaster.


I recently purchased a pair of speakers on Audiogon.  The price I offered was accepted and I sent the payment promptly.  The seller in return shipped the 2 speakers promptly and sent me the tracking numbers.  One of the speakers was delivered the next day and UPS has lost the other speaker.  The seller has put in a lost package investigation however UPs has not recovered the speaker.  It has been 8 days since the lost investigation has started.
I come to find out that the package was only insured for only half of what I paid for the whole package and it would cost twice that to replace the lost speaker new. So even if UPS cannot find the speaker and pay the insurance claim I cannot even replace the missing speaker for the amount of the claim.  
I'm not sure how to go about solving this issue.  I purchased and paid for a full set of speakers and only have 1.  
Any suggestion on what I should do next?  Has anyone ever experienced an issue such as this?  Does Audiogon have policies around issues such as this?

Thank you,
Vince
vtdragani
I think both Elizabeth and jmc are correct.
Though, for me, I would send back the one speaker and let the seller deal with the headache-Of course, you should receive a full refund. Audiogon, too, should be made aware of the issue.
B
Vince,

Please contact support@audiogon.com, Attn: Tammy if you want us to intervene. 
If you used a credit card, just wipe out the transaction with a phone call to your bank.   I suspect that 1 speaker is worth way less than the 2 you contracted for.   Can you even replace just one speaker of that type?
Hopefully the other speaker is on another truck and will be found. If you sell a pair of speakers for 5 grand you must insure them for 10 grand in case one gets lost or damaged because you will only be covered for the one that is lost or damaged. I hope all works out for you. Both speakers should be strapped onto a pallet then have shrink wrap around both of them to prevent losing one.