Get one for $99.99 and bring your number
With a Metro Flex Plus plan.
How to get this offer:

Join Metro on a Metro Flex Plus plan or add a line to your existing Metro account.
Bring your number and verify your identity.
Your iPhone 13 (128GB) is $99.99 via discount. You’ll need to pay any applicable sales tax. You can get this deal on up to 2 lines.
Existing customers adding a line will need to be on a Metro Flex Plus plan to get this offer. Check your current plan.