If you paid through Paypal (and if it is less 
than 60 days since you paid), you could possibly 
go that route. I truly feel this is the seller's 
fault (as already stated by others). They should 
have noticed a difference when insuring the 
package that the total seemed a little off. You 
could initiate a claim with your credit card 
company (if you paid this route through Paypal) 
and have the seller deal with the post office. 
As far as the seller saying that you could even 
claim a package that was uninsured, that is not 
the case. You must have some sort of proof of 
insurance. I once had a package arrive damaged. 
I took it to the post office. It took a little 
bit of emails to get the insurance stub from the 
seller, but they actually were able to scan it 
and send it to me via email attachment and I was 
able to print it out. I was able to take it into 
the post office that same day since the seller 
was nice enough just to scan it. The claims 
officer said that works just fine. I filled out 
all the glorious paperwork, and about 4 weeks 
later, got a check in the mail for the item and 
a few dollars extra. Thank goodness I paid with 
Paypal, as I easily just printed out the payment 
receipt and right there was my proof that what 
the item was insured for was what I paid for it. 
As far as your waiting a month on the seller, 
there is no way I would have done that. If I 
didn't get anything from the seller a week after 
I received the package, I would have 
automatically contacted Paypal/CC company and 
initiated a claim. This seller has not treated 
you very fairly or with respect. I hope 
everything turns out okay in the end. Good luck!