Sorry Guv, i know you want to keep this thread factual, but I would like to add my thoughts. Please delete if ness.
Lets not get too crazy here. Considering there are thousands of transactions made on this site every month without any problems whatsoever, i don't feel there is any need to take draconian measures. On the rare occasion that something does go wrong, then the site owner and its moderators do everything within their powers to resolve the matter. Why should we ask for more?
Placing restrictions on newbies is futile. They can soon run up a few dozen posts within 20 minutes to overcome any restriction. And anyway, there are examples where well established members have taken money and gone native.
On the whole, Retrobike is still one of the safest places to do business. Use your noggin, if it looks fishy don't buy- Simple. Take a little responsibility for your actions. But please don't let the actions of a few bad apples cloud your judgement.
Si