[londons_explore]

It surprises me that GaN marketed power supplies cost extra. The actual GaN transistors are under 10 cents now, and by using one you can use a smaller inductor, smaller capacitor and smaller heatsinks. Those smaller components lead to a smaller plastic case and smaller circuit board.

All of those smaller things cost less, so the finished product has lower production costs.

[tim333]

The ones I've bought haven't been terribly expensive. About half the price of Apple chargers. I daresay you don't want to go too cheap with chargers as they can overheat/pack up/damage things.