Re: How to know if a seller is legit or scammer?
The biggst thing is just good communications. I almost got burned once, but I had the seller's address which was all I needed to contact him directly and settle things. It turned out the seller was trying to 'flip' a product that hadn't yet arrived at his place and got delayed in shipping. So when a product is being sold, pics definitely help establish current ownership. Post count, longevity, and 'good guy' status also help, but understand that the mods are not here to mitigate disputes - if one complains, both get banned. This behavior serves to make all members act like gentlemen and police ourselves.
I made a purchase of a scope several years ago from a member. I sent funds, received confirmation funds were received and the scope boxed and ready to ship the next day. Ten days later, I hadn't received the scope, so I PM'd the member...turns out life happens, the box got covered up, and it was still at his house. The scope was sent the next day, and we were both happy. Never forget to communicate - most folks here are pretty honest, but trust your gut because it's still the internet.
I've also had dozens of transactions that went off without a hitch. The majority will; it's the one-offs that will throw you.