We don't know that. He never gave scgon tracking information or any indication that it was even shipped. Do you really think Customs will hold a 1 foot bundle of wires for 3 months?
If this was sent overseas, there is NO tracking information unless it is shipped by EMS.
The short green form that is used by USPS for Customs on 1st Class Airmail packages is not one that can be tracked. All it will show on the USPS website is that the package was shipped on a certain date.
I've had customs hold packages for almost 30 days for no reason. All the ICs I ship worldwide have packing slips in them with pricing and quantity of ICs being shipped. All the information on the packing slip matches the declared value on the outside of the package yet they've still held packages for almost 30 days in France, Spain (Canary Islands), Brazil, and Australia.
I would assume that after a certain time period that packages not accepted through customs would be returned (if marked for "return if not delivered" or would be destroyed/auctioned off.
The only proof the seller has of shipping something 1st Class Airmail is a copy of the receipt. I've had packages shipped overseas that the Post Office web site couldn't find the Customs number for. That was a puckering experience, but luckily the package arrived 21 days after I shipped it.
The Post Office here only keeps their part of the short green Customs form for a week so they aren't any help after a long time has passed.