for them on the market hoping that they will cost you a certain amount of money and end up surprised. You need to research what suv studded tires cost in the shops near you and make a choice where to purchase them from. For a single tire, you may need to have approximately $120, but this will vary depending on where you come from.
If you do not want to spend a lot of money than you can afford on the studded tires, it would be a good idea to buy them before winter approaches. There are some people who buy them early in summer because prices are lower at that point. When summer approaches, most tire shops start hiking the prices of the studded tires because they know that their demand is high, and people will buy them anyway.