I've never seen one with wobbles like the spider balls
I don't believe in breeding defective animals, why make more?
The question about it's temperament can't really be answered on a forum. We don't know enough about neurological disorders in snakes to make that call. It depends on the snake itself, your husbandry & handling practices.
It could well turn out to be an awesome pet only snake, I never heard of temperament problems in spider balls. I don't follow BP's like boas though either.
If you bought it as a 100% healthy breeder you got ripped though. Known issues should be disclosed before the sale, not when you open the box.