This article explains how to use cheaper cuts of meat for better results on your barbecue. For example,

Want an inexpensive and flavorful cut? Try hanger steaks. "Marinate and broil, like you would a regular steak," Lobel says. "The trick to cooking any steak is putting on kosher salt and fresh pepper. The less you put on a good steak, the better it will be."

Another good cut: a center-cut chuck steak. But stick to the center, says Lobel. "The further back you get, the tougher it gets."

Lots more ideas are in the article.