Trinity,

Those razors look pretty nice. The fact that you got 4 razors for under $100 is great deal in my opinion. Even if you have to re-scale one or more of them, you're still making out pretty well.

Considering their age and the fact that they're in a set, I suspect these are very high quality razors. These sorts of sets were often owned by the well-to-do of the time and I wouldn't be surprised if the scales are real ivory. The light staining on the shank and tang should be able to be buffed out.

Ed