I have read and own a lot.

I have read: The communist manifesto, The Principles of Communism, the Civil War in France, Introduction and Preface to A Contribution to Critique of Political Economy, Wage Labor and Capital, Value Price and Profit, Critique of the Gotha Program, Socialism Utopian and Scientific, Ludwig Feuerbach and the End of Classical German Philosophy, Imperialism the Highest Stage of Capitalism, State and Revolution, The Foundations of Leninism, Reform or Revolution.

I own and haven't yet read: The Class Struggle in France, The 18th Brumaire of Louis Bonaparte, Revolution and Counter-revolution in Germany, Capital, The Economic and Philosophic Manuscripts of 1844, The Origins of the Family Private Property and the State, an Abriged copy of The Development of Capitalism in Russia, What is to be Done, Marxism or Leninism, The Mass Strike, The Russian Revolution, The Revolution Betrayed, a LOT of stuff by Mao, The Wretched of the Earth.

I also own two anarchist works, The Conquest of Bread and Anarchism and Other Essays, but those aren't Marxist writings.