If you are a legit seller why not sell your coupons on the forum using the escrow? why use auto-buy link for a hand full of coupons?
if you want to sell them on the forum using a trusted member for escrow i can buy all of the coupons you have.
Beware of this scammer. He scammed someone before. https://bitcointalk.org/index.php?topic=3334982.msg34878984#msg34878984