I was scammed by the following user:
He sold me Starbucks gift cards which had the right balance for the first week. Since it has a balance for a week, you’d have no choice but to mark the transaction as “Complete”. Once you’ve done that, he would drain the cards to zero.
I reached out to Gameflip support for help, it’s a $10 gift card. I thought at least Gameflip would make things right and would help me recoup my losses. Instead, the support person Peter said I’ve marked it as “Complete” and they will not be able to help.
Gameflip and the scammers made money off of this scam. I can’t believe the support from Gameflip was so poor. Hopefully good guys like @DarkKnight can make this right.