Piping Rock offers its Piping Rock Resveratrol Defense 250mg + C 90-Capsule Bottle for $13.99 with $1.95 for shipping. That's $14 off and the lowest total price we could find, although we saw them for a buck less two weeks ago. Produced by grapes, Resveratrol purports to fight age-accelerating free radicals in the body. Deal ends October 23.