Today it was out for delivery at about 10:30am according to both the Amazon and the USPS trackers, to be delivered by 8pm. It's now going on eleven o'clock and no amplifier. Obviously I've given up hope for tonight (although the trackers still have the package as out for delivery, to arrive by 8pm April 19th).
If the trackers aren't updated tomorrow or if it doesn't come tomorrow regardless, what should I do? The seller obviously isn't to blame and I don't know who with the Postal Service to call. Maybe try the post office? but I really can't expect them -- or at least without spending an hour on hold -- to know everything about every last package. But I don't know what else to do.
I should probably wait until tomorrow to think about this, but whatever.