This is tough. We were all new once.
Restricting new members to invite only, especially by high feedback, established members seems like it would completely stunt site growth. Which some might appreciate but in general would probably be considered not a good thing.
Is there way that established members could generate a referral code? Like all the other popular apps that do something similar. This can link the new member to the refferal giving member, maybe giving the new member a specific badge showing they were reffered. But also link any negative feedback for the new member to the established one. Say for one year before the badge and link expire. This could help establish trust for new and low feeback users.
It's easy enough.
Simple change to the system that adds "Vouch for" in addition to "Buyer", "Seller" and "Trader" (if it's possible with Xenforo).
Post feedback using the "Add Feedback" button that notes that you 'vouch' for the person. Put your reputation on the line, and while you're at it, you're adding to his positive feedback score.
