Oh, I wanna see a pic of the splint!! In case I ever need one, perhaps I can make it.
I don't think that's a bad price, really. Though I do see what you're feeling, and now you've got an expensive duck.
Of course you'd never be able to sell it and get your money back. But, you know what, I doubt you wanted to sell it anyway.
Just be glad it wasn't a horse. It's typically $300 every time I have to call them for one of the horses! And I NEVER get out of the vet under $100 for one of the dogs, and that's just maintenance.
So in the grand scheme of things, not bad price, but when you look at that tiny duck, yup, seems like a LOT!
BTW, if you ever have something like that again, search this forum first, and perhaps the remedy will be right here. I know there are MANY posts on dealing with splayed legs, crooked legs, etc., with the chickens, but not sure about ducks.