There are lots of price lists for USSR coins. They are regularly been published by different coin dealers. And the correlation between prices for scarce and rare coins remains almost the same for 20-50 years.
But there's a problem how to read these price lists. The prices for scarce and rare coins (approximately starting with USD 10) are always buying prices. Those are the prices for which the dealers want to buy these coins from naive collectors. So these figures can be useful only to see the lowest bound of the price for these coins.
The buying price for all the other coins is not higher than:
USD 20 for 1 kg of coins of 1926-1957
USD 0,5 for 1 kg of coins of 1961-1991
And the selling prices are always 1,5 - 3 times higher than it's written in the price lists.
So I've tried to convert the prices into USD and make a real price list:
http://ciscoins.net/USSR.xlsNote: scarce and rare coins from mint sets always cost 1,5 - 2 times less than coins from circulation.
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P.s. Why I can't attach a *.xls file here? And why the size limit is so small? 65 Kb - that's almost nothing.