You made the same mistake like others. Why didn’t you feel it necessary to check his trust area before making the deal? This user is a proven scammer and have multiple red trust on his account. He is continuing his scam from 2015 and still he is hunting people's like you. I am seeing all negative trust with clear references but you missed that or didn’t took it seriously which put you in a situation like this. Sorry for your loss but you are enough lucky that amount wasn’t too big.
Try to be much careful in the future and don't forget to check users trust area before making any deal. You can open a flag against this scammer and add the link on your main thread.
Perhaps he missed the flag that Vod gave to this scammers. That was 5 years ago and still up to now this scammers continue to scam people out of their hard earn money, regardless of the amount. But the problem though is that there are still members here who think that they can buy and get discounted and thinking they the jackpot because the offer is cheap. Hard lessons for them, specially newbies.