All spiders have some amount of wobble, it's inherent to the gene. Some of them have it to a lesser extent, but they all have it.
This is true.
Although, you can find some that don't, physically, exhibit signs.
You would have to ask the breeder/seller if the Spider, or Spider combo, shows physical symptoms, of wobble, and to what extent.
I have a beautiful LesserBee (the only ball, with Spider, in my collection) that shows absolutely no signs of wobble (it is That imperceptible). One cannot tell just by looking at her.
However, genetically, she does carry "wobble" (the genetics for this neurological disorder), since she is a Spider combo. Thus, she Will pass it on to any Spider, or Spider combo, offspring that she would have (if bred).
Those Spider, &/or Spider combo, offspring, again, would, 100%, carry the genetics and would/could, physically, exhibit "wobble", to some extent or another (from imperceptible to obvious).
I had gotten this LesserBee in a package deal (snakes would not be sold separately). I had asked if she showed signs of wobble and, of course (& truthfully), was told that she did not. If she had, I may not have gone through with the deal.
Decided I would keep her, as a pet, because she is beautiful and a fantastic feeder (on f/t).
Alas, after having had her, for a bit, I, recently, decided to part with her, here soon, in a partial trade deal.
Strictly a business decision because I am going to be very sad to see her go.
Bottom line is that, if you are looking for a pet, don't let "wobble" dissuade you from getting a Spider or Spider combo.
If you want one, without (or with imperceptible) physical signs of "wobble", they are out there. Just examine the snake, in person, or, if not in person, ask the breeder/seller to what extent the snake exhibits physical signs.