Michael Heisley, who moved the Grizzlies from Vancouver to Memphis over 10 years ago, is selling the team to a group owned by communications technology executive Robert J. Pera. The team announced the sale agreement Monday in a news release that did not disclose financial terms, although ESPN.com reported the price to be $350 million. The sale is pending the approval of the NBA Board of Governors, antitrust clearance and other conditions. Heisley, 75, bought the Grizzlies in 2000, when the franchise