I do not buy my cards online. I do not buy my cards to begin with.
It may be arrogance but it's telling the truth. There is not a single SB card (and most any other codes of any type as well) sold on this forum and other forums like it that are "legit." You might want to believe they are, but you are dreaming.
If one accepts THAT FACT, then buys them, that's fine. It's just a gamble like playing roulette. But if any buyer or sellers says (or believes) they were not obtained by "less than legitimate means" they are either lying, misinformed or stupid.
Take the gamble, I have many times. I win some, I lose some, but I don't believe for 1 second they are legit which is why I won't pay more than 20-25% face value. I reduce my losses If they were legit there are a lot less anonymous places to sell. Call me arrogant, call me anything you want, but know it's the truth.
And if by some slight chance Ninetales, YOUR card(s) is real (meaning you or your friend paid full price for it at Starbucks and didn't get it from another seller who told you "it was legit" as they all say) then you'll never sell it for $80 when others are selling here for $20, $30, $40. There are REAL companies who will pay you 70% for it with no hassle. Just check out giftcardgranny (one of MANY) as an example.
So good luck selling cards for $80 even if they are 100% real. You can buy them on eBay for $70-$75 and actually be semi-protected unlike here where any promise of a "guarantee" is 100% worthless after a week when the seller suddenly disappears and/or changes his name.
Have a nice day, and sorry to burst your bubble.