Yes I have seen that type of price on this type of saw. The saw will not sell very quick at that price to a collector. I'm thinking of using the saw for some time then if I get tired of it I will sell it. There may not be that many running saws out there like this unless it has been re - built. Finding a saw this size for less then 700 - 900.00 may be hard to do. The saw will not go down much in value unless I damage it. I know the saw is a part of McCulloch history however it is also useful for cutting. Here in Oregon this saw is not valued as much as a collector saw as there is others around here in this logging area.
I'm only speaking from practical experience and milling , frankly I don't care if you glue googly eyes and paper ears to it and tell people you got a knew puppy.
Swinging that monster around in a mill set up would suck and consider needing just a gasket for something? Your not gonna get it locally.
If milling is what your serious about then you will get sick of that beast in a hurry and will be selling it ,and to boot when the buyer finds out its been used for milling? Well good luck because I'd walk away from that saw.
Sounds like you've made up your mind though but if your more flexible just ask in the milling forum what what they like .