U.S. and IAEA officials say they believe North Korea procured the P-2-style centrifuge designs from A.Q Khan following a barter trade conducted in the 1990s.

WSJ: North Korea Nuclear Find Raises Fears It Will Share With Iran

Fifth, at least the temporary Soviet loss of their indispensable arms-for-oil barter trade with their favorite client state, Iraq, resulting from the coalition embargo against Iraq last August.

CENTERFORSECURITYPOLICY: Excerpts From An Interview With Roger W. Robinson, Jr.

Note: Be sure you are comfortable with the complexities barter can introduce into your life and be up-front with your trade partner on the legalities.

FORBES: Bartering for Survival - Have I Got A Deal for You