Where can I go to make an informed purchase of used cell phones in St Catharines?

My husband and I bought a used cellphone a week ago for our niece . She has been begging us for a new Samsung Galaxy Note and we thought it would make an awesome Birthday gift. We went into MTX on Merritt in St. Catharines to inquire about one. Mobile Tech Xpress had a variety of Samsung phones for sale and only had one Samsung Galaxy Note available. We were sold! cellphone and were given a 90 day warranty. The staff also assisted us in choosing a case and screen protctor. We were very happy with the service we received and we are extremely excited to see her reaction when she receives her gift Thank you MTX staff