As someone who actually sells them. They start go in the high 7's to low 8's if they aren't financing. As stated here, financing costs money so obviously they are more if they go that route. If they get some nicer steps/lifts/ or even salt then in can easily get into 9-10k.
Jetsetter NXT is somewhat like that to but it starts in the high 9's.
As with any hot tub, it depends on what you put on it.