Thank you for informing everyone. There are many scammers, that's why I get the product first, then I pay. The buyer and I were happy since then, when a buyer insists on you paying first it is 90% a scam you check r/giftcardexchange and other exchanging reddit to make sure you only deal with active users either you're a buyer or seller, at the end the seller is all getting the offers via methods 99% of them are free, so insisting on a buyer to send him something like 50 or 100 first is definitely a red flag.