Right now Sav has the cheapest first year at $4.99, and Sav the cheapest renewal at $54.88. Over three years the lowest total at one registrar is $114.75 at Sav.
Why does .bio cost more after the first year?
Many registrars sell the first year below cost and recover it at renewal: at Sav, .bio renews at $54.88 after a $4.99 first year. Compare the renewal and 3-year columns before you buy.