As usual, it always advisable to be on a safer side when doing transactions outside exchange or escrow.

As it stands, I can only speak for myself, I have done 700 leaxcoin transactions with this guy and it was all successful!

If you want to do trade with him, you can ask him to send you payment first before you realise the your leaxcoin to him,  and do not try to scam him if he send you payment first.

Note: this is not an investment advice, but a personal opinion. Do your diligent research.