2-3 years ago I've put on ebay one consistent lot of Finland coins, 15-20 different from tsarist era and even more from 1920's to 1960's. Except one pierced 2 markkaa 186(3?) which was sold at unexpected high price and some tsarist copper pennias sold for $0.99/piece, all others remains unsold even after the second try. My opinion: there is a very low demand for these coins. Finland coins aren't the only in this situations, I think less than 10% of the non silver 20'th century coins are sought. Must be something interesting on it: art deco, elephants, zwastika, ships, to sell it. Mintage is significant for very few, because there are plenty of "key dates" for thousands types of coins.