The highest price for a 'normal' (non-custom) razor that doesn't have historic value or valuable scales would be the Iwasaki Tamehagane Westerns, NOS can easily fetch $3,000 or a little more. Kamijo is up there too, and a Zowada meteorite razor can bring a couple of grand or a litle more I believe, but it is a custom razor.

You could argue that the Iwasaki has some historic value which is true, but they also made a LOT of them. Kind of like Filly 14s, they're not hard to find but they are hard to find cheap.

Cheers, Steve