According to Serious Eats, a Gotta Have It (12 ounce) size ice cream costs approximately $4 to $5 with only two toppings, which are included in the price of the ice cream. The Cold Stone website does not offer any information on pricing, as prices are subject to change.
Of course, the price of a Gotta Have It size ice cream depends in part on the Cold Stone Creamery location. Prices are determined regionally, so the same ice cream in New York may cost radically more than it costs in Colorado, for instance. The same holds true for the other portion sizes, which are Like It (5 ounces) and Love It (8 ounces).