The best option to get the most out of your gift card or merchandise return card is to use it at the store that provided the card, where you’ll be able to utilize 100% of its value.  On the other hand, gift card buyers vary in what they offer.  Although online gift card buyers tend to offer more than local buyers, selling locally is a lot less stressful and risky.  Online gift card buyers also might add additional fees for shipping and for payment processing when paying you for your gift cards.