budgie gender

So, I got what I think is the best graduation gift ever! This is doc, i'm pretty sure its a boy because of his purple/pink nose. I'm not a budgie expert because this is my first budgie and I was wondering if he's a somewhat rare color? what mutation is he? Thanks for reading!

When I bought them I was told that that Petsmart was an all female store but after research online, I am now doubtful.:cool:

I've had Stormie for a little over a year now and his cere is still purple, it's not like a light purple but it isn't a deep shade either, I've been wanting to know his gender for a while now. He definitely acts like a male, but I did have a female in the cage with him his whole life but she...