Thank you Superstar. I actually was referring to the price of the wing clip.
I adopted a new cockatiel, and she isn't very tame, so I had her wings trimmed, so I can work with her out of her cage and she won't hurt herself flying around.
My keets are flighted, so I don't need to trim them. That said, I am too afraid to clip their wings myself. It's worth it to me to pay 15$ rather than mess up and clip a blood feather. Daisy had 3 blood feathers that the vet pointed out to me, and so he only clipped the very tips of those.
I'm good at nail trims, though. Well, for the boys. I swear my female keet, Peppy, bites her nails! They almost never need trimming.