Right now Porkbun has the cheapest first year at $78.99, and Porkbun the cheapest renewal at $160.71. Over three years the lowest total at one registrar is $400.41 at Porkbun.
Why does .rich cost more after the first year?
Many registrars sell the first year below cost and recover it at renewal: at Porkbun, .rich renews at $160.71 after a $78.99 first year. Compare the renewal and 3-year columns before you buy.