Russia to a large degree really only has two exports: OIL and WEAPONS.
They need the cash. Oil prices aren't where Russia (or OPEC) "needs" them to be to support their populations.
In Russia's case, they have a secondary market called WEAPONS to sell and make money. OPEC has oil and that's it.
Not surprising that Russia is selling weapons like crazy in the middle east right now. More accurately, has been for decades.
Maybe Russia’s support of Iran is the reason the Saudis were dumping oil on the market?....