It's not eBay, but AliExpress. ??
The word I got was that it's a shipping scam. The individual vendor shorts the postage, and then expects USPS to deliver it anyway, collecting the postage due. USPS tracking says they're not accepting the package for shipment. ?I've had this happen a few times. When it's from an individual, and just a bit short, I get a note in my mailbox to come and pay. ?The Chinese packages are a different story.?
