Big Deals via eBay offers the refurbished Apple iPhone 4 16GB Smartphone for Verizon in Black, model no. MC676LL/A, for $54.99 with free shipping. That's $15 under our refurb mention from July and the lowest total price we've seen for this model. (It's also $55 below the best price we could find for a new one today.) It comes with the original Apple USB charging cable, but does not include the charger.
A 60-day warranty applies, but it's unclear who backs it.