QUOTE(majestic12 @ Feb 26 2008, 05:50 PM)

Thanks! Russian coins are not my area, but I do sometimes take a risk and pick up coins I don't know about, provided they are VERY cheap. BTW, can someone please recommend a good beginner's book on Russian coinage?
Well, there is no single book which covers everything. Most references which cover coins issued during the imperial era (1700-1917) do not cover the wire kopeks, etc. which are older.
If you don't need prices/grades, I would start with V. V. Uzdenikov's
"Monety Rossii - Russian Coins". He covers every period beginning with approx. 1700 and ending with 1917. There are indications of rarity for every entry. Although he does not by far cover all varieties, most of the more important ones are listed there. There is also very valuable information WRT coin weights, alloy standards, mintage numbers, edge varieties, etc. It is a standard reference which is used by most auction houses, and almost everyone has it, so it is a common point of reference.
For more in-depth coverage of varieties, Bitkin is a valuable asset to have. For Russian silver coinage, there is RW Julian's book
"Russian Coinage 1796-1917" -- as the date indicates, if you want to collect anything earlier, and are particularly interested in silver, you should try to pick up a copy of the older book by Severin. It is somewhat hard to find, though, and will probably cost between $50 - $100. Brekke is best for copper, and there is a nice reprint of the Severin book on gold and platinum coinage published by Durst. Brekke also has price lists, and there have been updated supplements published in 1987 and 1997.
For Soviet issues, Rylov/Sobolin is very good, as is the more recent reference by Adrianov. Both of these also cover the imperial era and provide some breakdown of prices by grade. Also, mintage numbers given by Rylov/Sobolin seem to be very accurate, whereas Krause often isn't. I hardly ever refer to Krause these days any more for Russian coins, although I use it a lot for other world coins.