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

My husband 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 went to MTX on Merritt in St. Catharines to inquire about one. MTX had a few different Samsung phones for sale and happened to have one Samsung Galaxy Note available. We purchased the Samsung Galaxy Note and received a 90 day warranty. The staff also helped us in choosing a cover and screen protctor. We were very pleased with the service we received and we can't wait to see her face when she receives her gift Thank you MTX staff