Malay (?) keris from Ebay

[Sajen]

I think that the rare hilt form and the rare sheat have been the reason that this keris reach such a high price. The hilt material seems to be from hippo ivory (see the attached picture, the black spots along a line are clearly to seen). This is also the reason why this hilt don't show to much patina since this material keep long time the white surface.