Inquire about the exotic sword.

You point to the unfamiliar blade at the back of the shop. "What is...that?" The weaponsmith follows your finger and smiles broadly.

"Ah! That. One of the jewels of our collection, though I'm afraid I didn't make it myself. That is a blade from distant Persia. It's not familiar to most Romans, and might feel odd in your hand, but it's a solid weapon nonetheless. And, I must say as a professional, a beautiful piece of work."

You nod. It is that - practically art, far more fascinating than the dull, workmanlike gladii that Roman soldiers use. No doubt it's expensive, but it could make a fine gift.

"What are you asking for it?" you ask.

The weaponsmith smiles. "For most? A small fortune. But I can see you're an ambitious young man, and I like that. For you, just 25 denarii."