$50 really? Is that what you charge? I've seen people pay up to 10k
How will the payment be made? If it is in Bitcoin, you can leave the topic in this board. But if it is in altcoin, then
https://bitcointalk.org/index.php?board=161.0 is appropriate.
I googled your email and did not find a lot of information. Your account is newbie/unknown Dev, so it is better to give others your experiences and the projects that you worked on.
Also, I don't think a person will risk $ 250 with an anonymous account. So it is better to provide an escrow.