It surprises me to hear it, me who have lived for twenty years in the Soviet Union. If there was exchange of services on a barter basis (like moving furniture for a bottle of vodka) that was certainly NOT the modus opreandi of the ECONOMY as a whole.
What I said is entirely correct. The internal Soviet economy below the level of Gosplan and inter-republic balancing was extremely underdeveloped in terms of the role of monetary currency.

Also, do not confuse "in kind" with "informal".