Apple's refurbished products carry a one-year warranty.
Brad's Deals Editor David,
Get an Apple-Certified Refurbished 256GB iPhone 8 Plus (unlocked) for $729 with free shipping at Apple.com. This is $120 less than a brand-new model, and Apple's refurbishing process is rigorous. It includes the same one-year warranty as a brand-new model and is eligible for an Apple Care extended warranty. You can get it in Silver, Space Gray, or Gold. Sales tax is charged in most states.