I hope things turn out well.
My "best shipping options" have changed in the past two or three years. The USPS regional distribution hub that handles everything to/from me has deteriorated from "great" to a Twilight Zone of delays, mis-routings, manglings, and permanent disappearances, so anything important should not risk it, not even Certified. FedEx ground has always/often been slow around me, but I'm pretty rural, and I think that "sometimes" things just bounce around in the local system (or the delivery truck) until they get around to justifying driving "way out here". UPS is still great for me. My point is know your current situation and don't assume anything based on "what you've always done". I also hope sellers will start to understand and perhaps accommodate when a buyer states a preference based on their local knowledge and personal experience.
Yeah, that seems to be what’s happening here. I’ve never had a seller ship anything of real value to me via USPS, so it didn’t occur to me to request otherwise. If I’d known, I would have asked for UPS or FedEx. They aren’t perfect, but at least their tracking works.