Does everybody know this puzzle?
It is like Rubik maze, but 2x2 and contains numbers.
How rare is it?

The one that I know of is called "Sinij Kubik" ("Blue Cube" in English).
It's very rare in packaging (I am selling one in my topic).
I don't know if it was ever distributed in any other packaging -- other than for the USSR market.

Aleksey,

Thanks for your information!
How much did you sell it?

I have found one in Klara's collection. Direct linking to photos is disabled there, so here's the link to the web page: http://www.klara.ws/blueinca.html

I someone has it in this packaging, I would love to trade for mine in Russian packaging. Just send me a PM!