Sounds like it was another source and might have had additional shipping costs, but they aren't charging any more.
If it were me, I would probably just let them ship it.
He mentioned from another plant... Didn't sound like any kind of bait and switch, just a different factory.
If it is not 100% to your satisfaction, you could always turn around and throw it up on E-bay.
I don't think they would offer anything that was junk or not meeting their standards. The unit I got had excellent build quality. Everything was very sturdy and worked perfect out of the box. But if you are sketched-out completely...