Buying from trustworthy sellers is a good starting point. The sellers you see on our BST threads are trustworthy, as are the other members that I've bought from in the past. Every now and then there's a knucklehead (
Mr. Bartiromo, we await the activation of your stealth accounts that will "spam the hell out of the boards") but as a rule, they're good guys. Also, developing your own eye to tell what is good and what is forged will help give you peace of mind. I'm trying to do that as I build my project; it takes time, and it's a WIP, but it's getting there. Hope this helps.