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i don't think this is ivory though. let us know when you get it though (if you got it). will probably clean nicely.

Yes I was debating till the last moment on this and the other one but decided I've got way too many razors and don't need to get every single good deal :)
The ivory mk 31 sold for 150 though.

They are not very rare, and with enough patience you can find one on ebay for $10-$30. Hope this helps you decide what to do with it.