At Radio Shack a blue iPhone 5c cost around 400 dollars. It may be
a little cheaper if you find it on sale.
The Apple iPhone 6 plus will cost $399 with a contract.
Radio Shack is a retail store that sells new phones. They do not sell used products.
Yes, you can unlock phones at RadioShack when activating a cell phone service. You may also be required to pay a fee for unlocking or activating service on a new phone.