GET YOUR REAL ESTATE LICENSE TODAY!! Century 21 Celli is an affiliate of Harris Real Estate School. 40 hours of class time is required for taking the MA Real Estate Salesperson Test. Classes are offered at our Stoneham location, 270 Main Street, daily from 9:30 – 1:30. Classes can be individual or with a group by watching 20 DVD’s at your own pace. Study Guides are included. Give us a call @ 781-438-1230 to set up your class today!