MobilePros1 via eBay offers the refurbished Unlocked Apple iPhone 5s 32GB 4G LTE GSM Smartphone in Space Gray or White/Silver for $379.99 with free shipping. That's $320 under our June mention of a new unit and the lowest total price we've seen for an unlocked 32GB iPhone 5s. (It's also $225 less than the lowest total price we could find for a new unit today.) Although unlocked, it's still only usable on GSM carriers such as AT&T and T-Mobile.
Note that no warranty information is provided.