Decent set of clubs for teen….

I use these: LINK 6i through GW with decent graphite shafts for $240. If you go with steel shafts, $180.

He’s about to be 14.

5’9” so I figured normal adult clubs?

I’m not a golfer so no clue…

Go to your local golf shop and look for used sets of game improvement irons. Any of the name branded sets will be fine. They should be able to check his club head speed and lie angle. This will let you know what flex shaft is needed and if he is has a standard, upright or flat lie angle. You can also find brand new sets of name branded clubs that are 3 to 4 years old. Just getting started I would get him a Driver, 5 wood, 4 hybrid, 5-Aw iron set, and depending on the Aw loft 54 or 56 degree sand wedge and 58,60 lob wedge. He's 5'9" so standard length clubs are fine.

eBay used set of Callaways with graphite shafts.

Sure would. Email?

Game improvement irons are a type of iron. Ping, Callaway, Taylor Made, etc. all offer GI irons. They are more forgiving, fly higher, and fly further for high handicappers who have lower swing speeds. The face and sweet spot are large which corrects off center strikes.

The opposite would be blades. Pros use blades because they can shape the ball and control height better.