Jamie Dimon, chairman and chief executive officer of JPMorgan Chase, bought a commercial co-op unit in the base of his Manhattan apartment building for $2.05 million…The sellers of the commercial co-op were listed as Stephen Marks and George Ellis, cardiologists whose practice was located at the address. The unit is one of 11 on the ground floor of the building, located between 93rd and 94th Streets. “They’re professional offices” said Jonathan Miller, president of New York-based appraiser Miller Samuel Inc. “Most of the time it’s a doctor, a psychologist, any type of medical practice. It’s not uncommon for it to be a place to write a book, or just a place to work, or have a private office.” Maintenance is $6,663 a month for the 2,577-square-foot (239-square-meter) unit, which has 12 rooms and two half-baths. [Bloomberg]