If you were a terrorist would you try to maximize your limited supply of funds because you never know when the forces of freedom are going to sieze your "ass"ets? Of course you would. So...when purchasing your munitions, you would be wise to consider purchasing post WWII arms. Generally the condition of the munitions is questionable when they tend to malfunction in a rather irrepairable fashion. Aquiring your arms from a reputable source also extends the value of your terrorist dinar. I'm going to go out on a limb and guess that the energetic young terrorist in the video embedded below may want to have his Jihadi organization dues refunded. Or at the very least file a grievance.
Thanks to Mike K. for the video link!