Based on the pictures provided, I don't see any kinks, and i have had the opportunity to see some severely kinked animals and some not so severely kinked animals in person as well as in pictures.
I'd also ask for additional images with the supposed kink well documented, either by labeling or video or whatever.
IF it were me, I'd get better documentation of the kink, and if its actually there provide a partial refund. It can be chalked up to a newbie type mistake, but if someone doesn't know how to look over an animal for a healthy specimen I most likely won't be offering any animals to them in the future. The bigger problem is; is the kink something the animal hatched with, or did it happen while it was in the care of the keeper? Prime example: My first snake, as a hatchling was perfect, until I snagged her tail in the lid of her cage. Now she's got a bump on the end of her tail (you can't see it since she's 2000 something grams, but I know its there). It doesn't show up in pictures either.
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