The prices of a Spartan Race will vary, depending on the length (Sprint, Super, Beast) and type of the course, as well as how many racers have already signed up for that block. As more racers sign up for each block the price will increase.
The prices of each specific event are listed on the event page, along with other important details about the event - location, parking, etc.
Prices listed on the event page are listed per person, not per team.