EXHIBIT 10 (OO) PURCHASE/SALE AGREEMENT DATED AND EFFECTIVE DECEMBER 16, 1997 BETWEEN THE COMPANY, AS BUYER, AND CONTINENTAL EXECUTIVE PARKE, VERNON HILLS, ILLINOIS, MADE ON MARCH 2, 1998 Daniel B. Zoller Arnstein & Lehr 120 South Riverside Plaza...Purchase/Sale Agreement • March 20th, 1998 • CDW Computer Centers Inc • Retail-catalog & mail-order houses • Illinois
