Best Buy offers the used Apple iPhone 4s 16GB Smartphone for Verizon in Black for $99.99 with free shipping. That's tied with last week's used mention as the lowest total price we've seen for this model in any condition. (It's also $74 under the best price we could find for a new unit.)

Also available is the used Apple iPhone 4s 16GB Smartphone for Sprint for $99.99 with in-store pickup only. That's tied with last week's used mention and $96 under the best price we could find for a new unit.

A 90-day Best Buy warranty applies to both.