If it were me, I'd grab it on sight, but my earliest memories of a television were of a similar DuMont. As a three-year-old, I was mesmerized by that big round knob, the smell of the glowing tubes inside and the rest of it. I have a lot of memories associated with that old DuMont.
I also grew up spinning records on that kind of Webster record changer. The changer had been put into a wooden plinth made by my Uncle, who gave it, along with a tube amp and speaker he made, to my parents as a wedding gift. [They were married around '48-'49, so the dates are right for that set.] I never learned if he transplanted the Webster from the DuMont, and had assumed they were always separate, but now I suspect he may have removed it from the DuMont. [

A little research is called for!]
So for me, just the sight of that thing is a nostalgia trip down memory lane to the most magical period of my life!
What's more, it would fit in perfectly with the kind of (mostly Oriental) furniture/decor we have in the apartment here in Hong Kong, today. Yep, I'd grab it in a flash, as I don't think I could possibly ever find a vintage TV more perfectly-suited to me, period!
But those are all personal reasons, not inherent in the set itself, and thus would be irrelevant to anyone else. $420 before the cost of any parts or the time needed to repair it... is it worth that, to
you? Only you can answer that question. But I know how I'd answer it, and because of all those memories, I'd gladly pay a premium for one of those sets, today!