Callaway releases a new series for for irons every year. What that means for you, is that you can find used callaway iron sets for cheap and they may only be a few years old. Right now is the perfect time to upgrade your old set with a newer model that has newer technology incorporated into it. The apex models that were released in 2019 are some of the highest reviewed iron sets of all time. With them being five years old, you get them for a heck of a deal. And if you want to go even more modern than that, the stealth iron sets are incredibly forgiving and lend themselves to golfers who play bogey golf.