I have no idea about the real market value. Maybe Haseeb78 (the owner of Chiefa Coins website) has an idea about actual prices.
But I can give you the prices in Krauses Unusual World Coins:
These are the prices in the Unusual World Coins, 4th edition, 2005.
In the 6th edition, 2011 prices are still the same except for BU which is 45.00
Don't forget this is a token, not a coin. Many coin collectors don't collect tokens. Prices are a matter of supply and demand and the demand for tokens is lower than for coins.
Another reason may be: look at the note in Krause: Total mintage for this type is included in X# TN1. And X# TN1 has a mintage of 10,000. So I don't know how accurate the mintage of 350 pieces is. Maybe Haseeb78 knows where the mintage number comes from.