The .38's come in a six pack.  They are great for training, especially when getting your brain trained for a double action trigger pull.  No damage to firing pins.  Also it's a safe way to practice the use of a speedloader for a DA revolver.

These were almost exactly the same size as the Hornady Critical Defense ammo that I carry in my 38.

These would also be great for teaching young people and first time shooters safe handling procedures.  And if you know that you want to buy a 38, take some with you to the gun store or auction and safely dry fire to see if it's the gun you ultimately want to purchase.

All in all, well worth the money.