We have some old Roman coins my brother bought from a coin dealer on the Internet.
They were not very expensive, I think he got 30 assorted coins for around $64.00.
What is cool about them is that even though they are not precious metal they actually are a part of history that you can own.
A few of the coins we have are from the time of Constantine. They have his inscription on one side and Romulus and Remus nursing from a wolf on the other.
One of the reasons that Roman coins are found buried like they were in this article is that Roman soldiers sometimes pooled there money together before a battle and buried it. Whoever was left alive after the battle could split the money.
Many times no one lived through the battle so the money stayed hid.