It always does irk me that people think that just because something is old, it's worth a lot of money.
In all honesty, 50's vintage fridges look great but they are massive energy hogs in comparison to modern fridges. I wouldn't want one.
Not to mention that I don't think I could trust an appliance that old with our food.
That's a debate right in itself I think, only because a 50 year old fridge could go on running another 50 years without issues for all I know.
I know a guy who has a chest freezer built in 1932 and it still runs today with absolutely zero maintenance, short of needing the occasional deicing every so often.