Identification / attribution of ancient greek coin

Picked up this coin at a LCS recently, was my first ancient coin purchase. They specified it was a didrachm from Thourioi, but I can't seem to find any identical coin images online (particularly the waves in the reverse). How can one typically identify the authenticity of ancient coins? Also, how can you determine a fair market value for these coins? It's usually much more straightforward to identify the right price with US coins, which is what I normally collect.

 

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Have a look at this one
https://cngcoins.com/Coin.aspx?CoinID=302040

 

Notice, though, that your coin has less wear/more detail than the CNG coin, so I would expect your coin to sell for more than CNG's. That is, unless I am missing something about the CNG example.

 

Thanks for the link! How can one identify typical market prices? Scrub through auction listings?
Also, are there any good primer books on ancient coins?

 

David Sear has a series of books about ancient coins. There's "Greek Coins and Their Values, vols. 1 and 2" and a 5 vol. set of "Roman Coins and Their Values."

There's the "Handbook of Ancient Greek and Roman Coins" by Zander Klawans.

I also saw the "Handbook [of] Greek and Roman Coins" by G.F. Hill, which I know nothing about. Perhaps someone on this list is familiar with it.

 

State, City: Lucania , Thourioi
Coin: Silver Stater
- Head of Athena Right wearing Crested Athenian Helmet ornamented with Skylla
THOUPIWN - Bull Butting Right, tunny fish swimming right in ex
Mint: Thourioi (400-350 BC)
Wt./Size/Axis: 7.22g / 20mm / -
References: Refs Ref:SNG ANS 1003*
Notes: Dec 10, 14 - * Similar to reference. Needs to be checked.

Bull missing his head and skylla incomplete but the cabinet toning is lovely,

 

Hill's book is from 1897, so I wouldn't rely on it too much as anything other than a historical artifact!