Can anyone be so kind as to provide some information about this Philip 2nd gold stater?

I am a US coin guy, and have no knowledge about ancients. Can anyone tell me about this coin? Any ideas as to value? I tried researching it on the net, but I found so many various Staters from the Pella mint, and couldn't find any information whatsoever on pricing. Anacs descriped it as :314-310 BC Greek Macedonia, Philip II, 354-336 BC, Av Stater, Pella Mint. Any idea why they listed 2 dates? (Birth date and ruling date?). I would greatly appreciate any knowledge one could impart to me about this piece! 
Here is the obverse:
http://i.imgur.com/y7jTw.jpg

Here is the reverse:
http://i.imgur.com/r6oJa.jpg

Here is the obverse:
http://i.imgur.com/y7jTw.jpg

Here is the reverse:
http://i.imgur.com/r6oJa.jpg

0
Comments
Its in the ballpark of $3,000+ value wise.
Macedon, Philip II 323-315 BC - AV stater 323-315 BC
Pella mint,
O: Laureate head of Apollo right
R: ΦΙΛΙΠΠOY, Charioteer driving biga right.
Cant make out the symbol underneath the horses leg. Some have M, some have a thunderbolt. It does affect rarity but not by much.
314-310 BC is the date the coin was struck/minted. that would make it a posthume coin , since Philip II died in 336 BC
354 - 336 is probably wrong, Philip II ruled from 359 untill he was murdered in 336 BC.
314 - 310 was the time Alexander the IV (son of Alexander the great) was king of Macedonia,
but he was still a boy, one of Alexander the great's generals , named Cassander was infact ruling Macedonia.
<< <i>314-310 BC is the date the coin was struck/minted. that would make it a posthume coin , since Philip II died in 336 BC
354 - 336 is probably wrong, Philip II ruled from 359 untill he was murdered in 336 BC.
314 - 310 was the time Alexander the IV (son of Alexander the great) was king of Macedonia,
but he was still a boy, one of Alexander the great's generals , named Cassander was infact ruling Macedonia. >>
Well said Andres, that was what I was going to post.
In Macedonia, the coins of Philip II continued to be minted long after his death and during the reign of his son Alexander the Great and even later. In general, later rulers tended not to mess with coins that were already accepted in commerce. The coins of the dead Philip II continued to be minted along with the coins of his son Alexander the Great. And of course the coins of Alexander the Great were minted for many years after his death.
Although ANACS shows it as Pella mint 314-310 BC, I have found that it is not uncommon with ANACS and NGC that they get ancients wrong to some degree. They both rely on the old standard references and don't seem to keep up with the latest research. But it's more than likely generally correct in this case.
That is a beautiful coin with an awesome reverse design.
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