devthedev is not replying, after many minutes. I would use extreme caution with is slow replying times.
You are kidding right? From what I have read Devthedev is based on the east coast of the US and it is night time there. To expect immediate responses is just ludicrous I am from the east coast of the US also, and it's not even midnight. I can clearly see that he is online.
His lack of response is not something that would cause others to want to be reasonably afraid of getting scammed. It is more likely that he is unwilling to do business with you