3. I can also do escrow, but prefer not because I'm not sure how much longer it takes.
you'd better use escrow that will be more safe guy
I really don't think escrow is honestly going to help very much. If the gift card was purchased with a stolen credit card then amazon can reverse the payment/transaction months after you have redeemed the gift card. Even if you have never attached a credit card to your account they will know who you are via the fact that you logged in with your IP address and the fact that you (most likely) had goods shipped to your house
I understand where you're coming from, but this was not purchased using a stolen credit card. Christmas was a couple days ago, and that's when I received it. There's not really a way to prove it was a gift because I don't think it's polite to ask for a receipt for a gift you got.
If this was the case and you are only asking for 80% of the gift card's value, I would suggest visiting purse.io and using your gift card to purchase bitcoin (likely receiving more then $40 worth of bitcoin).
This should be especially concerning because you are a brand new member (who apparently created your account for the sole purpose of selling your gift card) and as a result you have zero reputation.