Right now Sav has the cheapest first year at $1.74, and Sav the cheapest renewal at $19.75. Over three years the lowest total at one registrar is $41.24 at Sav.
Why does .ink cost more after the first year?
Many registrars sell the first year below cost and recover it at renewal: at Sav, .ink renews at $19.75 after a $1.74 first year. Compare the renewal and 3-year columns before you buy.