50% upfront is one of the most typical scammer methods of getting some funds upfront.
Want my opinion? Use escrow or fuck off
that is a person with negative feedback posting here? Do I have any scam accusation here after a month? no, do I have red tag? no. so better for you to go. Also I don't need to scam, I have a stable job and no need to run away for low amounts at all.
And I don't care if will be sold or not, I don't need urgent money or so.
If accuse a person for being a scammer show prove ok, idiot!