I like this one.
ex (RU=Russia) = USSR?
Something like that. Very brandable and easy to remember especially for Russians.
Mid xxx easily if you sell this one on Russian domaining forums.
Knowing the Russian domain market I should say you have a good chance to sell it to a Russian domainer for under $100, I think around $50 rather. If you don't find a right end-user, of course. But I see no one between those active on the market. But, imho, it is really great name for Russian expats.