Except they probably won't do it, but who knows with this forum.  Generally people selling gift cards at huge discounts are scammers, and it's safe to make the assumption that they are--there have been so many examples of this here, that it's hard to argue otherwise.  What business model would allow someone to sell gift cards at 50% or less of their value?  That's a question I've never seen answered by sellers.

And you got asked about the source of your gift cards, and your response basically was "prove they're carded".  That's not a good answer.