Sell gift cards securely from Rainbow Foods with Raise's online gift card marketplace. Your Rainbow Foods gift card will be listed in front of the thousands of buyers perusing our gift card exchange. To sell Rainbow Foods gift cards quickly, set the price between 2% and 20% off the original amount. The asking price is up to you, but it really depends on the popularity of Rainbow Foods gift cards. Remember, you can adjust the selling price of your gift card at any time.