Krystal Restaurant Trademarks that appear on this site are owned by Krystal Restaurant and not by CardCash. Krystal Restaurant is not a participating partner or sponsor in this offer and CardCash does not issue gift cards on behalf of Krystal Restaurant. CardCash enables consumers to buy, sell, and trade their unwanted Krystal Restaurant gift cards at a discount. CardCash verifies the gift cards it sells. All pre-owned gift cards sold on CardCash are backed by CardCash's 45 day buyer protection guarantee. Gift card terms and conditions are subject to change by Krystal Restaurant, please check Krystal Restaurant website for more details.