As a general rule, I only buy from people who have feedback. Yes, we all had zero feedback at some point, but I feel that noobs (like me) need to purchase something before selling or trading in order to get feedback for any future transaction. There is no real mechanism for verification of one's identity (should a sale go south) if no transaction has been made prior to this. One needs to donate to the board, purchase from another member or list references of trusted members they've dealt with. When I break this rule (and sometimes I do), I know I'm taking a calculated risk and it's one I'm willing to walk away from if I get burned.
Sh*t happens. We've all been scammed before but it makes us all the wiser!
On that note, if you've had a transaction with me, please give me feedback. You know who you are!