Back more than 10+ years ago, you could have bought an entire collection of commemorative Soviet rubles for 100 USD. This does not include the smaller commemorative denomination of 1967 coinage, Barcelona Olympics and the Red Book bimetal coins. But still for 64 coins - it was an excellent deal. I still have it to this day. Nowadays sellers want 5 - 10 dollars each (less for the earlier commemorative ones, more for the latter ones) - so they add up very quickly.