Newegg offers the refurbished Monster Cable 13-Foot HDMI Cable, model no. MC 700HD-4M NF, for $10. This $10 mail-in rebate drops it to $0. With $1.99 for shipping, that's $15 off and the cheapest Monster Cable HDMI cable of its length we've seen.
Also available is the Monster Cable 6.5-Foot HDMI Cable, model no. MC 500HD-2M NF, for $7 before this $7 mail-in rebate, $0 after. With $1.99 for shipping, that's $5 under the lowest total price we could find for a new one. Deals end December 6.
A 90-day warranty applies to both models, although it's unclear who supports it.