JemJem via Walmart offers the refurbished Unlocked Apple iPhone 6 64GB 4G LTE GSM Smartphone in Space Gray for $154 with free shipping. That's the lowest price we could find for a refurb today by $4, although we saw it for a buck less in November. Note: A 90-day warranty applies, but it's unclear who backs it.
Every household should have these products on hand. Buying them in bulk on Amazon saves you cash.