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

My wife and I picked up a used phone a week ago for our granddaughter. She has been asking us for a new Samsung Galaxy Note and we thought it would make a great Christmas gift . We decided to go into 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 Note 3 available. We grabbed the Samsung Galaxy Note and were given a 90 day warranty. The staff also assisted us in choosing a cover 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 gift Thank you Mobile Tech Xpress