For $13,500 that would annoy me significantly. I have first hand experience with dried out cosmoline, it can permanently stain the ground surfaces besides being a pain to remove. Something else that doesn't like to sit for years unpowered are capacitors, in particular start/run motor caps. As for "badly rusted" that's not something I would expect to deal with on a brand new $13k machine.
Glad you got the dials sorted out, yeah they spin around from metric to inch. That's good news on the chuck though I had already planned to replace it with a PB. I have detailed specs on the cross slide, compound vs spindle centerline, CXA is the right choice. BXA is too small and CA is too large.
So this means I would have to drive up there and inspect the specific machine I would buy, duly noted. Hopefully they have some newer stock in Bellingham vs 2012. Would appreciate further updates as you make progress. As for your rust issue here's a tip from the guys who restore rusted old iron, they soak towels in Evaporust, lay them on the rusted areas and cover them in plastic, the stuff is amazing at removing rust I'd try that first. I first used Evaporust on a 1952 machine which had some significant rust on a rough casting you could not really wire brush, it came out amazing, no elbow grease required. Just rinsed it with some water and some very light scrubbing with a plastic bristle brush. Effortless. The rust was 100% GONE!