How much is half a frank worth?

Answer 1

'bout a cocktail sausage.

OK, a "frank" is a hot dog. I think you mean franc, the currency that France used before the euro was adopted in 2002.

Assuming your coin was (a) taken from circulation and (b) minted after 1960, it's worth about a dime. If it's older than that, please post a new question with its date.

Answer 2

Please post a new question that includes the coin's date.