A group of Boston College students is circulating a petition protesting Oliver North's speaking engagement on campus, but the protest is over financial - not political - reasons. North, one of the stars of the Iran-Contra scandal, now makes a living by speaking for $25,000 per shot, and some Boston College students say he's overpriced. "For $18,000, I was told we could have had Jimmy Carter, and he's a former president," said student journalist Jean Graham, who is leading the protest of North's scheduled Nov. 2 appearance. "It's one thing to bring in someone just for the hype and the popularity. But I don't think we can learn that much from Oliver North." Last year, the school had both Gary Hart and Robert Bork for a combined price of less than $30,000.