Yeah, but your liability will end once it gets to Delaware. Just call eBay if/when he submits a claim and they'll close it out.
So, as I suspected, the package reached Delaware, but now the tracking says that the package delivery "was not able to update" and has been stuck at that since Friday. Of course today, Mr. with the Russian email address messages me through eBay asking where his gloves are, so I told him he's a scammer and to check with USPS.