Well, she's home. I'll head to the DMV first thing in the morning to try and get the registration all taken care of. It was a long day of driving back and forth, but worth it.
The car is a really solid, honest car. The seller had the undercarriage steam cleaned which is why it photographed so well. The paint looks to have been polished some, but I don't see any spots where they burned through. It is definitely a time capsule, and will need some cleanup. Seller didn't have both plates on hand, said he'd find the other one and mail it to me. No service history, but i guess you can't have everything.
Turn signal switch not working, not sure if the DMV will test them or not.
I've already found a rare restoration part that I'm hoping to go pick up tomorrow which I'll share once I've secured it. I guess the protocol would probably be to start a new thread over in the S30 section about build progress.