[Arran]

Oh, are we talking of that same guy who's been selling that 680 there forever and at some point was repulsing prospective buyers by threats to report people and promissing not to budge at all?

Sounds like a mental case bucking to get thrown off fleabay. You can't report a buyer/bidder just because he offers less then what you ask for something, but you can get get thrown off for threatening people.
As for Craters and Freighters, the cutesy name would turn me off for one thing, for another they don't actually ship anything themselves they look for space on the trucks of a third party, so middlemen really. In this case you and the 680 guy got lucky, but I know of a guy on the alternative who had Craters and Freighters arrange shipping on a DuMont "Royal Sovereign" and the set was dropped off a loading dock or a forklift smashing the 30BP4 round picture tube, which is almost made out of unobtanium, like I say they basically act as booking agents who rent space with third party transport companies.
I would try Greyhound if possible, but the chassis, speaker, clarifiers, and cabinet will have to be separated, most likely, there is a 100 pound hard limit on the bus.
Regards
Arran