Right now iPage has the cheapest first year at $5.99, and Hello.co the cheapest renewal at $14.99. Over three years the lowest total at one registrar is $42.83 at Dynadot.
Why does .pink cost more after the first year?
Many registrars sell the first year below cost and recover it at renewal: at iPage, .pink renews at $21.99 after a $5.99 first year. Compare the renewal and 3-year columns before you buy.