I never heard of Reverb before, but from other posts here I gather that are like eBay. So your beef should be with the seller, and possibly with PayPal.
I would sue the seller and the shipping company in small claims court
REVERB LOSES PACKAGE AND WON"T PAY LOSS
I buy a (2) piece pre-amp and power supply and Reverb ships it with signature only on one box, the other box is lost and they won't do anything, so I go into Pay-Pal and they say that its Reverb's problem so I can't file a "Un-delivered claim" ...So now I'm out at least 1200.00 for half of my purchase........Reverb lets the seller decide if they are going to pay a refund, So of course he won't pay the loss..............So when you buy on Reverb you will take a chance on losing your whole purchase and nobody will do anything.......