100% SCAMMERMy amazon codes were removed from account in few hours
Well it was pretty obvious, if you expected them not to be carded. 70% is a pretty big discount on an online store where you could pretty much buy anything for that price. Its best to avoid such people, or ask them for proof, that these cards were obtained legitly.
That isn't actually true that all discounted GC are obtain due to illegal methods - you just need to find your way to obtain those and ofc you still need to pay for them, but there's at least few legal ways you can get GC for ~40-50% of the price (not the GC itself, but things you can use to buy those), and if you sell them for 75% it's nice profit. But it looks like OP rather wanna scam people instead of giving them HQ product. :/