I normally do not like suggesting that someone
sues, but if the USPS screwed up that bad, they
should pay for it!

I wonder if it would be possible to take the USPS
to small claims court over this.

I too second the recommendations for taking photos
of the packaging, the cel and also ask the seller
if she can send you some pictures of the item
BEFORE being shipped to show exactly what damage
is attributable to the post office's mishandling.

Has anyone ever had to do this?