Awwww.. this didn't work out for you huh? There are other tricks and scam strategies.
I understand your skepticism, I guess in a "wild west" environment like the crypto world, you need skepticism to survive.
To be honest, I thought an escrow platform would be a great fit for buying/selling btc rather than doing it through forums but then again, I'm not sure what the regulatory framework would be and what exactly Escrow.com or another escrow platform would have to do legally speaking to start facilitating crypto deals. Oh well, c'est la vie.