Co-owner Mark Sherony launched Marxam—a business that sells office machines for mailing, billing and auditing services—in 2006. From his modest offices in western Chesterfield, he manages business customers' mailing needs throughout the St. Louis area. It's a business, he says, that requires a physical presence, because the machines often need to be serviced. Marxam is an independent dealership and is unaffiliated with other companies.