Feather hair extensions, estimated cost?

So my friend & I are gonna get feather hair extensions soon, and I need an estimated price for feather clumps, or just single feathers. And what color I should get? I recently dyed my hair dark brown, but it kinda has a reddish tint to it. I was either going to get purple, or turquoise. I am thinking of either getting just one clump of a few feathers, or like 5 single feathers spread out. Which would cost less, and which do you think would look best? Thanks.<3