1) The Principles of Communism outright advocate for the abolishment of private property, in which price for commodity forms cannot arise because there is no individual ownership of capital. As we live in a Capitalist society, businesses individually account for their own internal stock and base all judgements of who to sell, what to sell, when to sell, where to sell and why to sell, upon the conditions of the market dictated by supply and demand. In a Communist society where there is abundance, recording consumption based on inventory accounting is the most objective way to measure the demand of society. 2) Petty bourgeoise are essentially "lite" versions of the bourgeoise, they tend to take the form of small business owners or relatively comfortable accumulation of capital (Somewhere around 250k - 1M dollars in bank). 3) Socialism in One Country was more or less based on material necessity, the interwar period saw little in the way of successful worldwide revolutions and the Soviet Union's industry was just far too insufficient at the time to support these revolutions. As seen in the Cold War, the USSR never gave up the aspirations of supporting uprisings and many proxy wars were fought against the bourgeoise powers. The most successful of these proxy wars would be Cuba, Korea, Vietnam and Laos in which the socialist governments were put into power.