Where can I go to buy used cell phones in St Catharines?

My wife and I picked up a used mobile phone a month ago for our niece . She has been begging us for a new Samsung Galaxy Note and we thought it would make the perfect Christmas gift . We went to Mobile Tech Xpress on Merritt in St. Catharines to inquire about one. MTX had a variety of Samsung phones for sale and only had one Samsung Galaxy Note available. We grabbed the phone and were given a 90 day warranty. The staff also helped us in choosing a otter box and screen protctor. We were very happy with the quality of service we received and we can't wait to see her face when she receives her present. Thank you Mobile Tech Xpress