Help looking for price reference #

Just purchased my first Alexander coin. I know it's heavily worn, but there's a lot of impressive collectors here so I'm reaching out.

The seller listed it as 336-323 bc, but that is all the information I have about it. If really like to know the price reference and where it was minted.

Thanks in advance!

Side question: why do some people consider 336-323 coins posthumous? Alexander died in June of 323 so if you have a coin minted within this timeframe there's a 96.4% chance it was minted during his lifetime.