I too agree that it doesn't appear to be Vanilla. Here are two Vanilla girls of mine from different breeders and you can see the head blushing. Also the one in the picture you posted looks to be browning out like a Pastel.

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I would pass as it doesn't appear to be the morph the Seller is saying it is. Too me, any morph worth adding to my group should leave me with no doubt as to it's genetics. That's just my $0.02.