Right now internet.bs has the cheapest first year at $3.99, and Hello.co the cheapest renewal at $36.00. Over three years the lowest total at one registrar is $108.00 at Hello.co.
Why does .ski cost more after the first year?
Many registrars sell the first year below cost and recover it at renewal: at internet.bs, .ski renews at $108.53 after a $3.99 first year. Compare the renewal and 3-year columns before you buy.