Heard back from the seller.

Yup. The "gift" I received on Monday was the switch I ordered. But no paperwork, no indications who sent it, just sent as an anonymous "gift."

Yesterday's delivery receipt? Bogus. Not sure how he pulled it off... or if there was really a delivery, or where it went...

I smell a scam. I wasn't the one being scammed; I don't know if he scammed eBay out of whatever they'd get from the delivery fee, if he scammed Amazon for a "free" delivery he should have paid for, disguised as a "gift", or if something else is going on... like the real delivery being something... I don't know, illegal? contraband? a cover up for something else?

It certainly is the strangest "gift" I've received in a long time, if ever.