Take a look at Costco. From one of the forums I'm on, they had the iPhone SE (same size as 5S) for $200 for 32 GB, and I think $300 for 128 GB. But the stock is probably almost depleted and your closest store may not carry it, so maybe call? Otherwis...
Who was your previous service provider, or better, who is the phone locked to? Hypothetically, let's say your phone is locked to Rogers. You need to call Rogers Customer Service (or live chat if they still do that), and request your iPhone(s) to be u...