Nosy Be Blue Sex?

[Tapple]

Help. Can someone that knows sexing of young nosy be blue's tell me if this 4 month old is female or male. The eyes are slightly salmon color and tail seems rounded. But doesn't seem to have the bulge before vent. I want to put her/him, up for sale but don't know sex yet. I wish they wore blue or pink outfits.
I'm guessing it's a female.

 

[SPork]

I think it looks like a male, but i would wait for someone with more experience to chine in.