I have coins from the reign of Tsar Mikhail Feodorovich, Empress Ekaterina II, Emperors Pavel I, Aleksander I and Nikolai I. I did have a coin or two from the reign of Elisaveta I but they seem to have disappeared in a move. As for paper, I had hundreds of notes once but now only have a few notes from the reign of Nikolai II.
I see the coins on ebay also. I particulary like the large five kopek coins from Empress Ekaterina II but I learned while in Russia that one needs to touch and hold these coins in order to determine if they are new, there are of course some give away signs on many of the new fakes, such as the copper surface being blacken by heat, the edges of the coin being sharp etc.
David