Hi Makoto,
Best for everyone to form their own assessment about value. I think the discussion about monetary value is forbidden on this
forum for
good reason. Also most of us collect coins for the enjoyment we derive from them, not for their intrinsic value.
Here are some ways you can form your own assessment about value:
You can sign up for a premium account at
coinarchives or
acsearch and that will give you access to historical prices. I am not sure what premium
membership costs.
You can
search inventories of any dealers who have it in stock to see what they are
selling theirs for and in many cases, what they have sold it for. Start with
FORVM and see if they have this or a similar coin in stock. You can also
search sold listings on
eBay.
You can look on
wildwinds which sometimes preserves historical
price information in the "text"
part of an entry:
http://www.wildwinds.com/coins/greece/thrace/abdera/t.htmlYou can look at David
Sear's
Greek Coins & Their Values which may be helpful in developing a understanding of the comparative value of one coin to another - but I would not rely on it for the actual values themselves given its age.
You can look at the website which accompanies The Handbook of Greek Coinage called Greek coin values. I have not included the link here - but you can
google it and it will come up.
Peter