You are free to use a escrow , exchange is done instantly [within 15 minutes ]
If you do not use escrow then you are all but certain to get scammed, even for a small amount. There are multiple scam accusations against this person, including one for ~$10
already on the verge to pay the guy brother

, will pay him max by tomorrow

you will see

You had the money to pay them both over a week ago but you refused to do so then, why should I believe that you will repay your victims now?