I have never been a seller of gift cards, only a buyer. While there have been a number of names mentioned on the forum over the years, I have stuck with raise.com. There have been issues with cards that were bled off between the time Raise sold them to me and I received them and they always made good on my purchase $, though not the face value of the card. I have had 'in store only' cards that were evidently issued as a store credit that were denied because I was not the person of record to whom the credit was issued. Raise took care of getting my purchase $ back. Raise has extended their warranty to cover any card purchased within 12 months. They are obviously being protective of their buyers, which may mean they are less protective of their sellers.
PM me of what gift cards you have for sale, perhaps we can make a deal. (Not interested in cards for massages, beauty treatments and clothing stores.)