It's quite difficult to get some modules anywhere at the moment - there must be a used market in Russia though!
What do you think is the thing you are missing most and try to find something that will do that - and repeat etc
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities