"Talento" is not a specific ancient Greco-Roman coin but a unit of currency and weight, the Talent (or talanton), which was not a coin itself but a measure of 6,000 drachmas (Greek) or denarii (Roman) silver coins. Therefore, a "Talento" coin does not exist. You may be thinking of the denarius or drachma, common silver coins of the era, or the biblical parable of the talents, where one talent represented a vast sum of money.
What a "Talent" was:
Unit of Measurement:
The talent was a unit of weight, roughly 26 kg (57 lb) of silver in the Attic (Greek) standard.
Unit of Value:
It was also a unit of currency, equivalent to 6,000 drachmas or denarii.
Not a Coin:
It was a large block of valuable metal, not a minted coin itself.
What to look for instead:
Denarius:
A standard silver coin of ancient Rome.
Drachma:
The primary silver coin of ancient Greece, which also served as a unit of currency.
Key takeaway:
If you're interested in the "Talento" as described in the Bible, it represents a large amount of money.
If you're looking for an actual coin, you would be interested in the denarius or drachma, or other ancient coins whose value would depend on their condition and rarity.