How do purchase items from a member with no trader rating without offending them and still ensure that you don't come out on the wrong end of the deal?
You talk to them, look at their post history, and work up small. If you are suddenly on here looking to buy a $4,000 scope and make a garbage offer (
Not saying you are) maybe they will see you as the scammer? Just look at the other person if you were the seller and think how would you want the transaction to go if you were nervous.
The aspect of starting small is a big one. When I started out CGN was smaller, but I still tried to do primarily $5-25 parts with local people I could meet until I got 10 positive trader rating. Then I moved to larger items and shipping until I was in the 30+ positive trading rating. I know that's not as easy now, but if you plant to buy, sell and trade some amount that's the best way. I sometimes have the opportunity to buy stuff locally at yard sales and sell some of it, so I respect my trader rating.
There are obvious scammers on CGN: they're not hard to spot. Generally, other than once, I have had more issues with a few CGN sponsors (got shipped a gun many years ago with zero packing in a non-factory box, no case: it smashed around so bad it broke a Magpul magazine and had to be fixed at a gunsmith, for example, with zero f##ks given by the sponsor).
I have scammed myself by underestimating shipping (or recently, shipping went up 20% in a week between quote and getting money) and holding myself to what I quoted, more than being scammed by CGN members.
I got scammed by a member with 100 plus feedback and was on the site for a long time. Some of my best deals were zero feedbacks.
I was only 'scammed' once by a non-business member of CGN and it was someone with a high trader rating: paid for express shipping so I could get a choke for a friend's gun and get them hunting with their dead father's gun before the season ended (it was missing the choke: never found it)... and they got it shipped by snail mail with a stamp. There was no way in hell I could have gotten a shotgun choke through the mail in a letter for the price of a US stamp, and I paid for 3 day shipping for like $17. Suffice to say they didn't get hunting with that gun that season to honor their dead dad and the seller didn't care.