Right now Sav has the cheapest first year at $3.49, and Sav the cheapest renewal at $24.99. Over three years the lowest total at one registrar is $53.47 at Sav.
Why does .it.com cost more after the first year?
Many registrars sell the first year below cost and recover it at renewal: at Sav, .it.com renews at $24.99 after a $3.49 first year. Compare the renewal and 3-year columns before you buy.