I've seen the same thing up here. And it was for 3 phase equipment which I was pretty sure some of the people bidding didn't have electrical services for. As for the Grizz tools newer might be better as they might have worked some deficiencies out. Really old iron is different. I love how solid that old stuff was even though it might not have been as ergonomic or have the safety features of newer stuff. My two brothers in law worked at a big sawmill up in McKenzie, BC that had two planers. One was an old cast iron 1950s model and the other a 70s or 80s. The old one outperformed the new one every year they were there. It planed 1,000,000 board feet in one shift once.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.