Black market nukes and radioactive waste. Old Subs and piles of military equipment to the highest bidder. They do sell some oil also. Usually to countries that really need it, so they can get the most money for it.
Basicly everything. Russia covers 11.46% of the worlds surface. there is A LOT of resources in that area.
Russia produces: -A HUGE amount of oil -High performance Aircraft -Chemicals -Foodstuffs -Weapons -Fabrics and textiles -Natural gas -tractors and construction equipment -Diamonds -Power Plants -Gold -Power transmission tools and inful structure -Nuclear fuel -Advanced Electronics -Alcohol -Medical and scientific instruments